fix(rebalance): preserve access-denied delete errors

crates/ecstore/src/cluster/rpc/remote_disk.rs

@@ -50,10 +50,10 @@ use rustfs_protos::evict_failed_connection;
 use rustfs_protos::proto_gen::node_service::RenamePartRequest;
 use rustfs_protos::proto_gen::node_service::{
     BatchReadVersionRequest, BatchReadVersionResponse, CheckPartsRequest, DeletePathsRequest, DeleteRequest,
-    DeleteVersionRequest, DeleteVersionsRequest, DeleteVersionsResponse, DeleteVolumeRequest, DiskInfoRequest, ListDirRequest,
-    ListVolumesRequest, MakeVolumeRequest, MakeVolumesRequest, PreparePartTransactionRequest, ReadAllRequest,
-    ReadMetadataRequest, ReadMultipleRequest, ReadMultipleResponse, ReadPartsRequest, ReadVersionRequest, ReadXlRequest,
-    RenameDataRequest, RenameFileRequest, SettlePartTransactionRequest, SnapshotLeaseReleaseRequest, SnapshotLeaseRenewRequest,
+    DeleteVersionRequest, DeleteVersionsRequest, DeleteVolumeRequest, DiskInfoRequest, ListDirRequest, ListVolumesRequest,
+    MakeVolumeRequest, MakeVolumesRequest, PreparePartTransactionRequest, ReadAllRequest, ReadMetadataRequest,
+    ReadMultipleRequest, ReadMultipleResponse, ReadPartsRequest, ReadVersionRequest, ReadXlRequest, RenameDataRequest,
+    RenameFileRequest, SettlePartTransactionRequest, SnapshotLeaseReleaseRequest, SnapshotLeaseRenewRequest,
     SnapshotLeaseRequest, SnapshotLeaseResponse, StatVolumeRequest, UpdateMetadataRequest, VerifyFileRequest, WriteAllRequest,
     WriteMetadataRequest, node_service_client::NodeServiceClient,
 };
@@ -112,28 +112,6 @@ const EVENT_REMOTE_DISK_RPC: &str = "remote_disk_rpc";
 const SNAPSHOT_LEASE_PROTOCOL_VERSION: u32 = 1;
 pub const REMOTE_SNAPSHOT_LEASE_TTL: Duration = Duration::from_secs(60);
 
-fn decode_delete_versions_errors(response: DeleteVersionsResponse, expected_len: usize) -> Vec<Option<Error>> {
-    if !response.item_errors.is_empty() {
-        if response.item_errors.len() != expected_len {
-            return vec![Some(Error::other("malformed delete_versions item errors")); expected_len];
-        }
-        return response
-            .item_errors
-            .into_iter()
-            .map(|error| (error.code != 0).then(|| error.into()))
-            .collect();
-    }
-
-    if response.errors.len() != expected_len {
-        return vec![Some(Error::other("malformed delete_versions errors")); expected_len];
-    }
-    response
-        .errors
-        .into_iter()
-        .map(|error| (!error.is_empty()).then(|| Error::other(error)))
-        .collect()
-}
-
 fn snapshot_lease_token_from_response(response: SnapshotLeaseResponse) -> Result<SnapshotLeaseToken> {
     if !response.success {
         return Err(response.error.unwrap_or_default().into());
@@ -2428,6 +2406,8 @@ impl DiskAPI for RemoteDisk {
             return errors;
         }
 
+        // TODO(backlog): replace string errors with typed `StorageError` variants
+
         let result = self
             .execute_with_timeout(
                 || async {
@@ -2459,7 +2439,17 @@ impl DiskAPI for RemoteDisk {
             }
             return errors;
         }
-        decode_delete_versions_errors(response, versions.len())
+        response
+            .errors
+            .iter()
+            .map(|error| {
+                if error.is_empty() {
+                    None
+                } else {
+                    Some(Error::other(error.to_string()))
+                }
+            })
+            .collect()
     }
 
     #[tracing::instrument(level = "trace", skip_all)]
@@ -3770,63 +3760,6 @@ mod tests {
 
     static INIT: Once = Once::new();
 
-    #[test]
-    fn delete_versions_response_preserves_typed_item_errors() {
-        let errors = decode_delete_versions_errors(
-            DeleteVersionsResponse {
-                success: true,
-                errors: vec!["file not found".to_string(), String::new()],
-                error: None,
-                item_errors: vec![
-                    rustfs_protos::proto_gen::node_service::Error {
-                        code: DiskError::FileNotFound.to_u32(),
-                        error_info: "file not found".to_string(),
-                    },
-                    rustfs_protos::proto_gen::node_service::Error::default(),
-                ],
-            },
-            2,
-        );
-
-        assert!(matches!(errors.as_slice(), [Some(DiskError::FileNotFound), None]));
-    }
-
-    #[test]
-    fn delete_versions_response_accepts_legacy_string_errors() {
-        let errors = decode_delete_versions_errors(
-            DeleteVersionsResponse {
-                success: true,
-                errors: vec!["legacy error".to_string(), String::new()],
-                error: None,
-                item_errors: Vec::new(),
-            },
-            2,
-        );
-
-        assert_eq!(errors.len(), 2);
-        assert_eq!(errors[0].as_ref().map(ToString::to_string).as_deref(), Some("io error legacy error"));
-        assert!(errors[1].is_none());
-    }
-
-    #[test]
-    fn delete_versions_response_rejects_misaligned_item_errors() {
-        let errors = decode_delete_versions_errors(
-            DeleteVersionsResponse {
-                success: true,
-                errors: vec!["file not found".to_string()],
-                error: None,
-                item_errors: vec![rustfs_protos::proto_gen::node_service::Error {
-                    code: DiskError::FileNotFound.to_u32(),
-                    error_info: "file not found".to_string(),
-                }],
-            },
-            2,
-        );
-
-        assert_eq!(errors.len(), 2);
-        assert!(errors.iter().all(Option::is_some));
-    }
-
     #[test]
     fn disk_mutation_digest_marks_rolling_compatibility() {
         let mut request = Request::new(());

crates/ecstore/src/core/pools.rs

@@ -3416,6 +3416,9 @@ impl ECStore {
             )
             .await?;
 
+            let source_cleanup_mutation_fence = self
+                .acquire_decommission_source_cleanup_fence(bucket.as_str(), entry.name.as_str(), set.as_ref())
+                .await?;
             let cleanup_result = data_movement::cleanup_source_entry_if_unchanged(
                 set.clone(),
                 bucket.as_str(),
@@ -3427,6 +3430,7 @@ impl ECStore {
                     lifecycle_guard: bucket_incarnation_fence
                         .as_ref()
                         .and_then(|guard| guard.namespace_lock_guard()),
+                    object_mutation_fence: Some(&source_cleanup_mutation_fence),
                 },
                 "decommission",
             )
@@ -3528,6 +3532,22 @@ impl ECStore {
         Ok(())
     }
 
+    #[cfg(test)]
+    pub(crate) async fn decommission_entry_for_test(
+        self: &Arc<Self>,
+        idx: usize,
+        entry: MetaCacheEntry,
+        bucket: String,
+        set: Arc<SetDisks>,
+    ) -> Result<()> {
+        let worker_permit = Arc::new(Semaphore::new(1))
+            .acquire_owned()
+            .await
+            .map_err(|err| Error::other(format!("decommission test worker permit acquire failed: {err}")))?;
+        self.decommission_entry(CancellationToken::new(), idx, entry, bucket, set, worker_permit, None, None, None, None)
+            .await
+    }
+
     #[tracing::instrument(skip(self, rx))]
     async fn decommission_pool(
         self: &Arc<Self>,
@@ -4464,15 +4484,20 @@ impl ECStore {
     ) -> Result<()> {
         warn!("decommission_object: start {} {}", &bucket, &rd.object_info.name);
         let object_name = rd.object_info.name.clone();
-        let result = data_movement::migrate_object(
+        let mut migration = tokio::task::JoinSet::new();
+        migration.spawn(data_movement::migrate_decommission_object(
             self,
             pool_idx,
             bucket.clone(),
             rd,
             expected_bucket_incarnation_id,
             "decommission_object",
-        )
-        .await;
+        ));
+        let result = migration
+            .join_next()
+            .await
+            .ok_or_else(|| Error::other("decommission migration task was not started"))?
+            .map_err(|err| Error::other(format!("decommission migration task join error: {err}")))?;
         if result.is_ok() {
             warn!("decommission_object: migrated {} {}", &bucket, &object_name);
         }

crates/ecstore/src/data_movement/mod.rs

@@ -26,7 +26,7 @@ use crate::storage_api_contracts::{
     namespace::NamespaceLocking as _,
     object::{HTTPPreconditions, ObjectOperations as _},
 };
-use crate::store::ECStore;
+use crate::store::{ECStore, ObjectLockDiagGuard, SourceCleanupMutationFence};
 use bytes::Bytes;
 use rustfs_filemeta::{FileInfo, FileInfoVersions, ObjectPartInfo};
 use rustfs_rio::{EtagResolvable, HashReader, HashReaderDetector, Index, TryGetIndex};
@@ -856,7 +856,6 @@ fn is_equivalent_data_movement_object(source: &ObjectInfo, target: &ObjectInfo)
 fn is_superseding_unversioned_data_movement_object(source: &ObjectInfo, target: &ObjectInfo) -> bool {
     is_unversioned_data_movement_object(source)
         && is_unversioned_data_movement_object(target)
-        && !target.delete_marker
         && source
             .mod_time
             .zip(target.mod_time)
@@ -1028,6 +1027,7 @@ pub(crate) enum SourceCleanupError {
 pub(crate) struct SourceCleanupBucketFence<'a> {
     pub(crate) expected_incarnation_id: Option<uuid::Uuid>,
     pub(crate) lifecycle_guard: Option<&'a rustfs_lock::NamespaceLockGuard>,
+    pub(crate) object_mutation_fence: Option<&'a SourceCleanupMutationFence>,
 }
 
 fn ensure_source_cleanup_versions_match(
@@ -1065,7 +1065,9 @@ pub(crate) async fn ensure_source_cleanup_versions_unchanged(
 struct SourceCleanupDeleteBarrierState {
     bucket: String,
     object: String,
+    fence_pending: tokio::sync::Notify,
     arrived: tokio::sync::Notify,
+    is_paused: AtomicBool,
     release: tokio::sync::Notify,
 }
 
@@ -1079,7 +1081,7 @@ pub(crate) struct SourceCleanupDeleteBarrier {
 }
 
 #[cfg(test)]
-static SOURCE_CLEANUP_DELETE_BARRIER: std::sync::OnceLock<std::sync::Mutex<Option<Arc<SourceCleanupDeleteBarrierState>>>> =
+static SOURCE_CLEANUP_DELETE_BARRIERS: std::sync::OnceLock<std::sync::Mutex<Vec<Arc<SourceCleanupDeleteBarrierState>>>> =
     std::sync::OnceLock::new();
 
 #[cfg(test)]
@@ -1092,15 +1094,22 @@ impl SourceCleanupDeleteBarrier {
         let state = Arc::new(SourceCleanupDeleteBarrierState {
             bucket: bucket.to_string(),
             object: object.to_string(),
+            fence_pending: tokio::sync::Notify::new(),
             arrived: tokio::sync::Notify::new(),
+            is_paused: AtomicBool::new(false),
             release: tokio::sync::Notify::new(),
         });
-        let mut slot = SOURCE_CLEANUP_DELETE_BARRIER
-            .get_or_init(|| std::sync::Mutex::new(None))
+        let mut barriers = SOURCE_CLEANUP_DELETE_BARRIERS
+            .get_or_init(|| std::sync::Mutex::new(Vec::new()))
             .lock()
             .expect("source cleanup delete barrier mutex should not poison");
-        assert!(slot.is_none(), "source cleanup delete barrier must be unique");
-        *slot = Some(Arc::clone(&state));
+        assert!(
+            !barriers
+                .iter()
+                .any(|barrier| barrier.bucket == bucket && barrier.object == object),
+            "source cleanup delete barrier must be unique per object"
+        );
+        barriers.push(Arc::clone(&state));
         Self { state }
     }
 
@@ -1110,35 +1119,58 @@ impl SourceCleanupDeleteBarrier {
             .expect("source cleanup should reach the pre-delete barrier");
     }
 
+    pub(crate) async fn wait_until_fence_pending(&self) {
+        tokio::time::timeout(StdDuration::from_secs(30), self.state.fence_pending.notified())
+            .await
+            .expect("source cleanup should attempt the fixed mutation fence");
+    }
+
+    pub(crate) fn is_paused(&self) -> bool {
+        self.state.is_paused.load(Ordering::Acquire)
+    }
+
     pub(crate) fn release(&self) {
         self.state.release.notify_one();
     }
 }
 
+#[cfg(test)]
+pub(crate) fn notify_source_cleanup_mutation_fence_pending(bucket: &str, object: &str) {
+    let barrier = SOURCE_CLEANUP_DELETE_BARRIERS
+        .get_or_init(|| std::sync::Mutex::new(Vec::new()))
+        .lock()
+        .expect("source cleanup delete barrier mutex should not poison")
+        .iter()
+        .find(|barrier| barrier.bucket == bucket && barrier.object == object)
+        .cloned();
+    if let Some(barrier) = barrier {
+        barrier.fence_pending.notify_one();
+    }
+}
+
 #[cfg(test)]
 impl Drop for SourceCleanupDeleteBarrier {
     fn drop(&mut self) {
         self.state.release.notify_one();
-        let mut slot = SOURCE_CLEANUP_DELETE_BARRIER
-            .get_or_init(|| std::sync::Mutex::new(None))
+        let mut barriers = SOURCE_CLEANUP_DELETE_BARRIERS
+            .get_or_init(|| std::sync::Mutex::new(Vec::new()))
             .lock()
             .expect("source cleanup delete barrier mutex should not poison");
-        if slot.as_ref().is_some_and(|state| Arc::ptr_eq(state, &self.state)) {
-            *slot = None;
-        }
+        barriers.retain(|state| !Arc::ptr_eq(state, &self.state));
     }
 }
 
 #[cfg(test)]
 async fn pause_source_cleanup_before_delete(bucket: &str, object: &str) {
-    let barrier = SOURCE_CLEANUP_DELETE_BARRIER
-        .get_or_init(|| std::sync::Mutex::new(None))
+    let barrier = SOURCE_CLEANUP_DELETE_BARRIERS
+        .get_or_init(|| std::sync::Mutex::new(Vec::new()))
         .lock()
         .expect("source cleanup delete barrier mutex should not poison")
-        .as_ref()
-        .filter(|barrier| barrier.bucket == bucket && barrier.object == object)
+        .iter()
+        .find(|barrier| barrier.bucket == bucket && barrier.object == object)
         .cloned();
     if let Some(barrier) = barrier {
+        barrier.is_paused.store(true, Ordering::Release);
         barrier.arrived.notify_one();
         barrier.release.notified().await;
     }
@@ -1154,11 +1186,20 @@ pub(crate) async fn cleanup_source_entry_if_unchanged(
     op_label: &str,
 ) -> std::result::Result<ObjectInfo, SourceCleanupError> {
     let cleanup_key = encode_dir_object(object);
-    let ns_lock = set.new_ns_lock(bucket, cleanup_key.as_str()).await?;
-    let _guard = ns_lock
-        .get_write_lock(get_lock_acquire_timeout())
-        .await
-        .map_err(Error::from)?;
+    let source_guard = if bucket_fence
+        .object_mutation_fence
+        .is_some_and(SourceCleanupMutationFence::source_lock_covered)
+    {
+        None
+    } else {
+        let ns_lock = set.new_ns_lock(bucket, cleanup_key.as_str()).await?;
+        Some(
+            ns_lock
+                .get_write_lock(get_lock_acquire_timeout())
+                .await
+                .map_err(Error::from)?,
+        )
+    };
 
     if bucket_fence
         .lifecycle_guard
@@ -1168,6 +1209,14 @@ pub(crate) async fn cleanup_source_entry_if_unchanged(
             "{op_label}: bucket incarnation fence was lost before source cleanup"
         ))));
     }
+    if bucket_fence
+        .object_mutation_fence
+        .is_some_and(SourceCleanupMutationFence::is_lock_lost)
+    {
+        return Err(SourceCleanupError::Storage(Error::other(format!(
+            "{op_label}: object mutation fence was lost before source cleanup"
+        ))));
+    }
 
     ensure_source_cleanup_versions_unchanged(set.clone(), bucket, object, expected, allowed_missing, op_label).await?;
 
@@ -1182,7 +1231,12 @@ pub(crate) async fn cleanup_source_entry_if_unchanged(
         expected_bucket_incarnation_id: bucket_fence.expected_incarnation_id,
         ..Default::default()
     };
-    opts.add_namespace_lock_guard(&_guard);
+    if let Some(source_guard) = source_guard.as_ref() {
+        opts.add_namespace_lock_guard(source_guard);
+    }
+    if let Some(object_mutation_fence) = bucket_fence.object_mutation_fence {
+        object_mutation_fence.add_namespace_lock_fence(&mut opts);
+    }
     if let Some(bucket_lifecycle_guard) = bucket_fence.lifecycle_guard {
         opts.add_bucket_lifecycle_lock_guard(bucket_lifecycle_guard);
     }
@@ -1330,6 +1384,37 @@ fn data_movement_part_upload_failure_stage(err: &Error) -> &'static str {
     }
 }
 
+pub(crate) async fn migrate_decommission_object(
+    store: Arc<ECStore>,
+    pool_idx: usize,
+    bucket: String,
+    rd: GetObjectReader,
+    source_bucket_incarnation_id: Option<uuid::Uuid>,
+    op_label: &str,
+) -> Result<()> {
+    let source = rd.object_info.clone();
+    let _mutation_fence = store
+        .acquire_decommission_object_mutation_fence(&bucket, &source.name)
+        .await?;
+    let current = find_data_movement_target_info(store.as_ref(), pool_idx, &bucket, &source)
+        .await?
+        .ok_or(Error::FileNotFound)?;
+    if !is_equivalent_data_movement_object_identity(&source, &current, true, false) {
+        return Err(Error::FileNotFound);
+    }
+
+    migrate_object_inner(
+        store,
+        pool_idx,
+        bucket,
+        rd,
+        source_bucket_incarnation_id,
+        op_label,
+        Some(&_mutation_fence),
+    )
+    .await
+}
+
 pub(crate) async fn migrate_object(
     store: Arc<ECStore>,
     pool_idx: usize,
@@ -1337,6 +1422,18 @@ pub(crate) async fn migrate_object(
     rd: GetObjectReader,
     source_bucket_incarnation_id: Option<uuid::Uuid>,
     op_label: &str,
+) -> Result<()> {
+    migrate_object_inner(store, pool_idx, bucket, rd, source_bucket_incarnation_id, op_label, None).await
+}
+
+async fn migrate_object_inner(
+    store: Arc<ECStore>,
+    pool_idx: usize,
+    bucket: String,
+    rd: GetObjectReader,
+    source_bucket_incarnation_id: Option<uuid::Uuid>,
+    op_label: &str,
+    mutation_fence: Option<&ObjectLockDiagGuard>,
 ) -> Result<()> {
     let object_info = rd.object_info.clone();
     let has_part_checksums = object_info
@@ -1350,7 +1447,7 @@ pub(crate) async fn migrate_object(
         let mut new_multipart_opts = data_movement_new_multipart_opts(&object_info, pool_idx);
         new_multipart_opts.expected_bucket_incarnation_id = source_bucket_incarnation_id;
         let (res, target_pool_idx, expected_bucket_incarnation_id) = match store
-            .handle_new_multipart_upload_with_pool_idx(&bucket, &object_info.name, &new_multipart_opts)
+            .handle_new_multipart_upload_with_pool_idx(&bucket, &object_info.name, &new_multipart_opts, mutation_fence)
             .await
         {
             Ok(res) => res,
@@ -1448,7 +1545,7 @@ pub(crate) async fn migrate_object(
             if let Err(err) = store
                 .clone()
                 .complete_multipart_upload_for_data_movement(
-                    target_pool_idx,
+                    (target_pool_idx, mutation_fence),
                     &bucket,
                     &object_info.name,
                     &res.upload_id,
@@ -1609,7 +1706,7 @@ pub(crate) async fn migrate_object(
     let mut put_opts = data_movement_put_object_opts(&object_info, pool_idx);
     put_opts.expected_bucket_incarnation_id = source_bucket_incarnation_id;
     let (target_pool_idx, put_result) = store
-        .put_object_for_data_movement(&bucket, &object_info.name, &mut data, &put_opts)
+        .put_object_for_data_movement(&bucket, &object_info.name, &mut data, &put_opts, mutation_fence)
         .await
         .map_err(|err| data_movement_stage_error(op_label, "prepare_put_object", &bucket, &object_info.name, err))?;
     if let Err(err) = put_result {
@@ -3541,25 +3638,47 @@ mod tests {
     }
 
     #[test]
-    fn test_precondition_conflict_rejects_newer_delete_marker() {
-        let source = ObjectInfo {
-            size: 128,
-            etag: Some("etag-source".to_string()),
-            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
-            ..Default::default()
-        };
-        let target = ObjectInfo {
-            delete_marker: true,
-            etag: None,
-            mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
-            ..source.clone()
-        };
+    fn test_precondition_conflict_accepts_only_newer_null_delete_marker() {
+        for version_id in [None, Some(Uuid::nil())] {
+            let source = ObjectInfo {
+                version_id,
+                size: 128,
+                etag: Some("etag-source".to_string()),
+                mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+                ..Default::default()
+            };
+            let target = ObjectInfo {
+                delete_marker: true,
+                etag: None,
+                mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+                ..source.clone()
+            };
 
-        let should_resume =
-            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
-                .expect("delete marker conflict should be evaluated");
+            assert!(
+                resolve_data_movement_overwrite_resume_result(
+                    &Error::PreconditionFailed,
+                    Ok(Some(target.clone())),
+                    &source,
+                    0,
+                    1,
+                )
+                .expect("newer null delete marker should be evaluated")
+            );
 
-        assert!(!should_resume);
+            let mut same_time = target.clone();
+            same_time.mod_time = source.mod_time;
+            assert!(
+                !resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(same_time)), &source, 0, 1,)
+                    .expect("same-generation null delete marker should be rejected")
+            );
+
+            let mut versioned = target;
+            versioned.version_id = Some(Uuid::new_v4());
+            assert!(
+                !resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(versioned)), &source, 0, 1,)
+                    .expect("a UUID delete marker must not erase a null source version")
+            );
+        }
     }
 
     #[test]

crates/ecstore/src/disk/local.rs

@@ -858,6 +858,7 @@ const EVENT_DISK_LOCAL_DIRECT_IO_FALLBACK: &str = "disk_local_direct_io_fallback
 #[cfg(target_os = "linux")]
 const EVENT_DISK_LOCAL_URING_LATCH_OFF: &str = "disk_local_uring_latch_off";
 const EVENT_DISK_LOCAL_DELETE_FAILED: &str = "disk_local_delete_failed";
+const EVENT_DISK_LOCAL_DELETE_ROLLBACK_FAILED: &str = "disk_local_delete_rollback_failed";
 const EVENT_DISK_LOCAL_CHECK_PARTS: &str = "disk_local_check_parts";
 const EVENT_DISK_LOCAL_ACCESS_FAILED: &str = "disk_local_access_failed";
 const EVENT_DISK_LOCAL_VOLUME_SETUP_FAILED: &str = "disk_local_volume_setup_failed";
@@ -6106,6 +6107,43 @@ impl LocalDisk {
         Ok((bytes, modtime))
     }
 
+    async fn write_missing_delete_marker(
+        &self,
+        volume: &str,
+        path: &str,
+        fi: FileInfo,
+        object_dir: &Path,
+        xl_path: &Path,
+        rollback_dir: Option<Uuid>,
+    ) -> Result<()> {
+        if let Some(rollback_dir) = rollback_dir {
+            let rollback_path = object_dir.join(rollback_dir.to_string());
+            fs::create_dir_all(&rollback_path).await.map_err(to_file_error)?;
+            fs::write(rollback_path.join(DELETE_MARKER_ROLLBACK_FILE), [])
+                .await
+                .map_err(to_file_error)?;
+        }
+        if let Err(err) = self.write_metadata("", volume, path, fi).await {
+            if let Some(rollback_dir) = rollback_dir
+                && let Err(restore_err) = restore_delete_rollback(object_dir, xl_path, rollback_dir, &self.publication_root).await
+            {
+                warn!(
+                    event = EVENT_DISK_LOCAL_DELETE_ROLLBACK_FAILED,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_DISK_LOCAL,
+                    result = "failed",
+                    volume,
+                    path,
+                    rollback_dir = %rollback_dir,
+                    error = ?restore_err,
+                    "Disk local delete rollback failed"
+                );
+            }
+            return Err(err);
+        }
+        Ok(())
+    }
+
     async fn delete_versions_internal(&self, volume: &str, path: &str, fis: &[FileInfo], opts: &DeleteOptions) -> Result<()> {
         let volume_dir = self.io_get_bucket_path(volume)?;
         let xlpath = self.io_get_object_path(volume, format!("{path}/{STORAGE_FORMAT_FILE}").as_str())?;
@@ -6123,7 +6161,20 @@ impl LocalDisk {
             return restore_metadata_backup(object_dir, &xlpath, rollback_dir, &self.publication_root).await;
         }
 
-        let (data, _) = self.read_all_data_with_dmtime(volume, volume_dir.as_path(), &xlpath).await?;
+        let (data, _) = match self.read_all_data_with_dmtime(volume, volume_dir.as_path(), &xlpath).await {
+            Ok(data) => data,
+            Err(DiskError::FileNotFound) => {
+                // `deleted` alone can be an explicit marker purge; only
+                // `mark_deleted` may create metadata that was not present.
+                let Some(delete_marker) = fis.iter().find(|fi| fi.deleted && fi.mark_deleted).cloned() else {
+                    return Err(DiskError::FileNotFound);
+                };
+                return self
+                    .write_missing_delete_marker(volume, path, delete_marker, object_dir, &xlpath, opts.old_data_dir)
+                    .await;
+            }
+            Err(err) => return Err(err),
+        };
 
         if data.is_empty() {
             return Err(DiskError::FileNotFound);
@@ -10422,29 +10473,9 @@ impl DiskAPI for LocalDisk {
                 }
 
                 if fi.deleted && force_del_marker {
-                    if let Some(rollback_dir) = rollback_dir {
-                        let rollback_path = file_path.join(rollback_dir.to_string());
-                        fs::create_dir_all(&rollback_path).await.map_err(to_file_error)?;
-                        fs::write(rollback_path.join(DELETE_MARKER_ROLLBACK_FILE), [])
-                            .await
-                            .map_err(to_file_error)?;
-                    }
-                    if let Err(err) = self.write_metadata("", volume, path, fi).await {
-                        if let Some(rollback_dir) = rollback_dir
-                            && let Err(restore_err) =
-                                restore_delete_rollback(file_path.as_path(), &xl_path, rollback_dir, &self.publication_root).await
-                        {
-                            warn!(
-                                volume,
-                                path,
-                                rollback_dir = %rollback_dir,
-                                error = ?restore_err,
-                                "failed to restore metadata after delete marker commit error"
-                            );
-                        }
-                        return Err(err);
-                    }
-                    return Ok(());
+                    return self
+                        .write_missing_delete_marker(volume, path, fi, file_path.as_path(), &xl_path, rollback_dir)
+                        .await;
                 }
 
                 return if fi.version_id.is_some() {

crates/ecstore/src/object_api/types.rs

@@ -24,7 +24,7 @@ use crate::storage_api_contracts::{
 pub struct NamespaceLockFence {
     signals: Arc<Vec<Arc<rustfs_lock::distributed_lock::LockLostSignal>>>,
     #[cfg(test)]
-    forced_lost: Arc<std::sync::atomic::AtomicBool>,
+    forced_lost: Arc<Vec<Arc<std::sync::atomic::AtomicBool>>>,
 }
 
 impl Debug for NamespaceLockFence {
@@ -40,13 +40,17 @@ impl NamespaceLockFence {
         Self {
             signals: Arc::default(),
             #[cfg(test)]
-            forced_lost: Arc::new(std::sync::atomic::AtomicBool::new(false)),
+            forced_lost: Arc::new(vec![Arc::new(std::sync::atomic::AtomicBool::new(false))]),
         }
     }
 
     pub(crate) fn is_lock_lost(&self) -> bool {
         #[cfg(test)]
-        if self.forced_lost.load(std::sync::atomic::Ordering::Acquire) {
+        if self
+            .forced_lost
+            .iter()
+            .any(|lost| lost.load(std::sync::atomic::Ordering::Acquire))
+        {
             return true;
         }
         self.signals.iter().any(|signal| signal.is_lost())
@@ -57,27 +61,26 @@ impl NamespaceLockFence {
     }
 
     fn extend(&mut self, other: &Self) {
-        if Arc::ptr_eq(&self.signals, &other.signals) {
-            return;
+        if !Arc::ptr_eq(&self.signals, &other.signals) {
+            Arc::make_mut(&mut self.signals).extend(other.signals.iter().cloned());
         }
-        Arc::make_mut(&mut self.signals).extend(other.signals.iter().cloned());
         #[cfg(test)]
-        if other.forced_lost.load(std::sync::atomic::Ordering::Acquire) {
-            self.forced_lost.store(true, std::sync::atomic::Ordering::Release);
+        if !Arc::ptr_eq(&self.forced_lost, &other.forced_lost) {
+            Arc::make_mut(&mut self.forced_lost).extend(other.forced_lost.iter().cloned());
         }
     }
 
     #[cfg(test)]
     pub(crate) fn lost_for_test() -> Self {
         let fence = Self::new();
-        fence.forced_lost.store(true, std::sync::atomic::Ordering::Release);
+        fence.forced_lost[0].store(true, std::sync::atomic::Ordering::Release);
         fence
     }
 
     #[cfg(test)]
     pub(crate) fn loss_handle_for_test() -> (Self, Arc<std::sync::atomic::AtomicBool>) {
         let fence = Self::new();
-        (fence.clone(), Arc::clone(&fence.forced_lost))
+        (fence.clone(), Arc::clone(&fence.forced_lost[0]))
     }
 }
 
@@ -411,6 +414,13 @@ impl ObjectOptions {
         self.namespace_lock_fence.get_or_insert_with(NamespaceLockFence::new);
     }
 
+    #[cfg(test)]
+    pub(crate) fn add_namespace_lock_fence_for_test(&mut self, fence: &NamespaceLockFence) {
+        self.namespace_lock_fence
+            .get_or_insert_with(NamespaceLockFence::new)
+            .extend(fence);
+    }
+
     pub(crate) fn ensure_lifecycle_delete_all_journal(&mut self) {
         self.lifecycle_delete_all_journal
             .get_or_insert_with(|| Arc::new(parking_lot::Mutex::new(LifecycleDeleteAllJournalState::default())));

crates/ecstore/src/services/rebalance/entry.rs

@@ -334,6 +334,7 @@ impl ECStore {
                             lifecycle_guard: bucket_incarnation_fence
                                 .as_ref()
                                 .and_then(|guard| guard.namespace_lock_guard()),
+                            ..Default::default()
                         },
                         "rebalance",
                     ),

crates/ecstore/src/set_disk/mod.rs

@@ -735,8 +735,12 @@ pub(crate) use core::io_primitives::disk_call_counters;
 mod ctx;
 mod metadata;
 mod ops;
+#[cfg(test)]
+pub(crate) use ops::multipart::NewMultipartUploadCommitObservation;
 #[cfg(any(test, feature = "test-util"))]
 pub use ops::multipart::{MultipartCommitBarrier, MultipartCommitPause};
+#[cfg(test)]
+pub(crate) use ops::object::DeleteObjectCommitBarrier;
 #[cfg(feature = "test-util")]
 pub(crate) use ops::object::TransitionCleanupStoreBarrier as SetDiskTransitionCleanupStoreBarrier;
 pub(crate) use ops::object::body_cache_plaintext_len;
@@ -3025,6 +3029,16 @@ pub struct SetDisks {
     storage_class_config_override: Arc<std::sync::RwLock<Option<Arc<storageclass::Config>>>>,
 }
 
+// DistributedLock sends the raw ObjectKey to its clients; LockRegistry clones
+// each endpoint's canonical Arc, so an exact Arc set identifies the lock domain.
+pub(crate) fn same_distributed_lock_domain(left: &[Arc<dyn LockClient>], right: &[Arc<dyn LockClient>]) -> bool {
+    left.iter()
+        .all(|left_client| right.iter().any(|right_client| Arc::ptr_eq(left_client, right_client)))
+        && right
+            .iter()
+            .all(|right_client| left.iter().any(|left_client| Arc::ptr_eq(left_client, right_client)))
+}
+
 const ERASURE_CACHE_MAX_ENTRIES: usize = 32;
 
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -3600,6 +3614,15 @@ impl SetDisks {
         &self.ctx
     }
 
+    /// Whether both sets' namespace-lock implementations cover the same object key.
+    pub(crate) async fn shares_namespace_lock_domain(&self, other: &Self) -> bool {
+        match (self.ctx.is_dist_erasure().await, other.ctx.is_dist_erasure().await) {
+            (false, false) => Arc::ptr_eq(&self.local_lock_manager, &other.local_lock_manager),
+            (true, true) => same_distributed_lock_domain(&self.lockers, &other.lockers),
+            _ => false,
+        }
+    }
+
     /// The lock manager this set actually uses (test-only; Phase 5 Slice 3).
     #[cfg(test)]
     pub(crate) fn local_lock_manager_for_test(&self) -> &Arc<rustfs_lock::GlobalLockManager> {
@@ -4584,11 +4607,11 @@ fn should_preserve_delete_replication_state(opts: &ObjectOptions) -> bool {
 }
 
 fn should_force_delete_marker_for_missing_version(opts: &ObjectOptions) -> bool {
-    opts.delete_marker || (opts.versioned && opts.version_id.is_none() && !opts.data_movement)
+    opts.delete_marker || ((opts.versioned || opts.version_suspended) && opts.version_id.is_none() && !opts.data_movement)
 }
 
 fn resolve_delete_version_state(opts: &ObjectOptions, goi: &ObjectInfo, version_found: bool) -> (bool, bool) {
-    let mut mark_delete = goi.version_id.is_some() || (opts.versioned && opts.version_id.is_none());
+    let mut mark_delete = goi.version_id.is_some() || ((opts.versioned || opts.version_suspended) && opts.version_id.is_none());
     let mut delete_marker = opts.versioned;
 
     if opts.version_id.is_some() {

crates/ecstore/src/set_disk/ops/multipart.rs

@@ -32,6 +32,8 @@ use crate::crash_inject::{self, CrashPoint};
 use crate::multipart_listing::paginate_multipart_listing;
 use futures::{StreamExt, stream};
 use std::future::Future;
+#[cfg(test)]
+use std::sync::atomic::AtomicBool;
 #[cfg(any(test, feature = "test-util"))]
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::time::Duration;
@@ -65,6 +67,7 @@ impl StaleMultipartCleanupGuard {
 #[cfg(any(test, feature = "test-util"))]
 #[derive(Clone, Copy, PartialEq, Eq)]
 pub enum MultipartCommitPause {
+    NewUploadBeforeLockLost,
     PutPartBeforeLockAcquire,
     PutPartBeforeLockLost,
     PutPartAfterRename,
@@ -156,6 +159,72 @@ impl Drop for MultipartCommitBarrier {
     }
 }
 
+#[cfg(test)]
+struct NewMultipartUploadCommitObservationState {
+    bucket: String,
+    object: String,
+    committed: AtomicBool,
+}
+
+#[cfg(test)]
+pub(crate) struct NewMultipartUploadCommitObservation {
+    state: Arc<NewMultipartUploadCommitObservationState>,
+}
+
+#[cfg(test)]
+static NEW_MULTIPART_UPLOAD_COMMIT_OBSERVATION: std::sync::OnceLock<
+    std::sync::Mutex<Option<Arc<NewMultipartUploadCommitObservationState>>>,
+> = std::sync::OnceLock::new();
+
+#[cfg(test)]
+impl NewMultipartUploadCommitObservation {
+    pub(crate) fn install(bucket: &str, object: &str) -> Self {
+        let state = Arc::new(NewMultipartUploadCommitObservationState {
+            bucket: bucket.to_string(),
+            object: object.to_string(),
+            committed: AtomicBool::new(false),
+        });
+        let mut slot = NEW_MULTIPART_UPLOAD_COMMIT_OBSERVATION
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("new multipart upload commit observation mutex should not poison");
+        assert!(slot.is_none(), "new multipart upload commit observation must be unique");
+        *slot = Some(Arc::clone(&state));
+        Self { state }
+    }
+
+    pub(crate) fn committed(&self) -> bool {
+        self.state.committed.load(Ordering::Acquire)
+    }
+}
+
+#[cfg(test)]
+impl Drop for NewMultipartUploadCommitObservation {
+    fn drop(&mut self) {
+        let mut slot = NEW_MULTIPART_UPLOAD_COMMIT_OBSERVATION
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("new multipart upload commit observation mutex should not poison");
+        if slot.as_ref().is_some_and(|state| Arc::ptr_eq(state, &self.state)) {
+            *slot = None;
+        }
+    }
+}
+
+#[cfg(test)]
+fn observe_new_multipart_upload_commit(bucket: &str, object: &str) {
+    let state = NEW_MULTIPART_UPLOAD_COMMIT_OBSERVATION
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("new multipart upload commit observation mutex should not poison")
+        .as_ref()
+        .filter(|state| state.bucket == bucket && state.object == object)
+        .cloned();
+    if let Some(state) = state {
+        state.committed.store(true, Ordering::Release);
+    }
+}
+
 #[cfg(any(test, feature = "test-util"))]
 async fn pause_multipart_commit(bucket: &str, object: &str, pause: MultipartCommitPause) {
     let barrier = {
@@ -1615,6 +1684,30 @@ impl crate::storage_api_contracts::multipart::MultipartOperations for SetDisks {
 
         let upload_path = Self::get_multipart_upload_dir(bucket, object, upload_uuid.as_str(), opts.data_movement);
 
+        #[cfg(any(test, feature = "test-util"))]
+        pause_multipart_commit(bucket, object, MultipartCommitPause::NewUploadBeforeLockLost).await;
+        if _object_lock_guard.as_ref().is_some_and(|guard| guard.is_lock_lost()) {
+            return Err(StorageError::NamespaceLockQuorumUnavailable {
+                mode: "new_multipart_upload_commit",
+                bucket: bucket.to_string(),
+                object: object.to_string(),
+                required: 1,
+                achieved: 0,
+            });
+        }
+        if opts
+            .namespace_lock_fence
+            .as_ref()
+            .is_some_and(NamespaceLockFence::is_lock_lost)
+        {
+            return Err(StorageError::NamespaceLockQuorumUnavailable {
+                mode: "new_multipart_upload_outer_lock",
+                bucket: bucket.to_string(),
+                object: object.to_string(),
+                required: 1,
+                achieved: 0,
+            });
+        }
         ensure_multipart_bucket_lifecycle_lock_held(bucket, object, opts)?;
         Self::write_unique_file_info(
             &shuffle_disks,
@@ -1626,6 +1719,8 @@ impl crate::storage_api_contracts::multipart::MultipartOperations for SetDisks {
         )
         .await
         .map_err(|e| to_object_err(e.into(), vec![bucket, object]))?;
+        #[cfg(test)]
+        observe_new_multipart_upload_commit(bucket, object);
 
         // evalDisks
 

crates/ecstore/src/set_disk/ops/object.rs

@@ -2483,6 +2483,7 @@ impl SetDisks {
                         })
                         .await?,
                     );
+                    notify_put_object_commit_namespace_acquired(bucket, object);
                 }
                 #[cfg(not(any(test, feature = "test-util")))]
                 {
@@ -4630,6 +4631,7 @@ struct PutObjectCommitBarrierState {
     arrived: tokio::sync::Notify,
     release: tokio::sync::Notify,
     namespace_pending: tokio::sync::Notify,
+    namespace_acquired: std::sync::atomic::AtomicBool,
 }
 
 #[cfg(any(test, feature = "test-util"))]
@@ -4651,6 +4653,7 @@ impl PutObjectCommitBarrier {
             arrived: tokio::sync::Notify::new(),
             release: tokio::sync::Notify::new(),
             namespace_pending: tokio::sync::Notify::new(),
+            namespace_acquired: std::sync::atomic::AtomicBool::new(false),
         });
         let mut slot = PUT_OBJECT_COMMIT_BARRIER
             .get_or_init(|| std::sync::Mutex::new(Vec::new()))
@@ -4685,6 +4688,10 @@ impl PutObjectCommitBarrier {
             .await
             .expect("put object should wait for the namespace lock after leaving the commit barrier");
     }
+
+    pub fn namespace_acquired(&self) -> bool {
+        self.state.namespace_acquired.load(std::sync::atomic::Ordering::Acquire)
+    }
 }
 
 #[cfg(any(test, feature = "test-util"))]
@@ -4741,6 +4748,22 @@ fn notify_put_object_commit_namespace_pending(bucket: &str, object: &str) {
     }
 }
 
+#[cfg(any(test, feature = "test-util"))]
+fn notify_put_object_commit_namespace_acquired(bucket: &str, object: &str) {
+    let barrier = PUT_OBJECT_COMMIT_BARRIER
+        .get_or_init(|| std::sync::Mutex::new(Vec::new()))
+        .lock()
+        .expect("put object commit barrier mutex should not poison")
+        .iter()
+        .find(|barrier| {
+            barrier.bucket == bucket && barrier.object == object && barrier.pause == PutObjectCommitPause::BeforeNamespace
+        })
+        .cloned();
+    if let Some(barrier) = barrier {
+        barrier.namespace_acquired.store(true, std::sync::atomic::Ordering::Release);
+    }
+}
+
 #[cfg(test)]
 struct DeleteObjectCommitBarrierState {
     bucket: String,
@@ -4750,7 +4773,7 @@ struct DeleteObjectCommitBarrierState {
 }
 
 #[cfg(test)]
-struct DeleteObjectCommitBarrier {
+pub(crate) struct DeleteObjectCommitBarrier {
     state: Arc<DeleteObjectCommitBarrierState>,
 }
 
@@ -4760,7 +4783,7 @@ static DELETE_OBJECT_COMMIT_BARRIER: std::sync::OnceLock<std::sync::Mutex<Option
 
 #[cfg(test)]
 impl DeleteObjectCommitBarrier {
-    fn install(bucket: &str, object: &str) -> Self {
+    pub(crate) fn install(bucket: &str, object: &str) -> Self {
         let state = Arc::new(DeleteObjectCommitBarrierState {
             bucket: bucket.to_string(),
             object: object.to_string(),
@@ -4776,13 +4799,13 @@ impl DeleteObjectCommitBarrier {
         Self { state }
     }
 
-    async fn wait_until_paused(&self) {
+    pub(crate) async fn wait_until_paused(&self) {
         tokio::time::timeout(Duration::from_secs(30), self.state.arrived.notified())
             .await
             .expect("delete object should reach the deterministic commit barrier");
     }
 
-    fn release(&self) {
+    pub(crate) fn release(&self) {
         self.state.release.notify_one();
     }
 }
@@ -5877,6 +5900,7 @@ impl crate::storage_api_contracts::object::ObjectOperations for SetDisks {
             if dobj.version_id.is_none() && (version_suspended || versioned) {
                 vr.mod_time = Some(OffsetDateTime::now_utc());
                 vr.deleted = true;
+                vr.mark_deleted = true;
                 if versioned {
                     vr.version_id = Some(Uuid::new_v4());
                 }
@@ -11636,6 +11660,7 @@ mod transition_upload_integrity_tests {
                 crate::data_movement::SourceCleanupBucketFence {
                     expected_incarnation_id: None,
                     lifecycle_guard: Some(&bucket_guard),
+                    ..Default::default()
                 },
                 "test_data_movement",
             )

crates/ecstore/src/store/mod.rs

@@ -151,7 +151,7 @@ pub(crate) mod init_format;
 pub(crate) mod list_objects;
 mod multipart;
 mod object;
-pub(crate) use object::ObjectLockDiagGuard;
+pub(crate) use object::{ObjectLockDiagGuard, SourceCleanupMutationFence};
 pub use object::{
     PrepareSelectObjectSnapshotError, PreparedGetObjectReader, SelectObjectSnapshot, SelectObjectSnapshotReadError,
     SnapshotConsistencyError,

crates/ecstore/src/store/multipart.rs

@@ -400,7 +400,7 @@ impl ECStore {
         object: &str,
         opts: &ObjectOptions,
     ) -> Result<MultipartUploadResult> {
-        self.handle_new_multipart_upload_with_pool_idx(bucket, object, opts)
+        self.handle_new_multipart_upload_with_pool_idx(bucket, object, opts, None)
             .await
             .map(|(res, _, _)| res)
     }
@@ -410,20 +410,22 @@ impl ECStore {
         bucket: &str,
         object: &str,
         opts: &ObjectOptions,
+        mutation_fence: Option<&ObjectLockDiagGuard>,
     ) -> Result<(MultipartUploadResult, usize, Option<Uuid>)> {
         check_new_multipart_args(bucket, object)?;
-        let (opts, _bucket_lifecycle_guard) = self.guard_multipart_bucket_incarnation(bucket, opts).await?;
-        let opts = &opts;
+        let (mut opts, _bucket_lifecycle_guard) = self.guard_multipart_bucket_incarnation(bucket, opts).await?;
 
         if self.single_pool() {
+            self.apply_decommission_target_mutation_fence(0, object, &mut opts, mutation_fence)
+                .await;
             return self.pools[0]
-                .new_multipart_upload(bucket, object, opts)
+                .new_multipart_upload(bucket, object, &opts)
                 .await
                 .map(|res| (res, 0, opts.expected_bucket_incarnation_id));
         }
 
         if opts.data_movement && opts.version_id.is_some() {
-            let idx = self.select_data_movement_pool_idx(bucket, object, -1, opts, false).await?;
+            let idx = self.select_data_movement_pool_idx(bucket, object, -1, &opts, false).await?;
             if idx == opts.src_pool_idx {
                 return Err(StorageError::DataMovementOverwriteErr(
                     bucket.to_owned(),
@@ -431,7 +433,9 @@ impl ECStore {
                     opts.version_id.clone().unwrap_or_default(),
                 ));
             }
-            let res = self.pools[idx].new_multipart_upload(bucket, object, opts).await?;
+            self.apply_decommission_target_mutation_fence(idx, object, &mut opts, mutation_fence)
+                .await;
+            let res = self.pools[idx].new_multipart_upload(bucket, object, &opts).await?;
             return Ok((res, idx, opts.expected_bucket_incarnation_id));
         }
 
@@ -454,7 +458,9 @@ impl ECStore {
             .await?;
 
             if !res.uploads.is_empty() {
-                let res = self.pools[idx].new_multipart_upload(bucket, object, opts).await?;
+                self.apply_decommission_target_mutation_fence(idx, object, &mut opts, mutation_fence)
+                    .await;
+                let res = self.pools[idx].new_multipart_upload(bucket, object, &opts).await?;
                 return Ok((res, idx, opts.expected_bucket_incarnation_id));
             }
         }
@@ -467,7 +473,9 @@ impl ECStore {
             ));
         }
 
-        let res = self.pools[idx].new_multipart_upload(bucket, object, opts).await?;
+        self.apply_decommission_target_mutation_fence(idx, object, &mut opts, mutation_fence)
+            .await;
+        let res = self.pools[idx].new_multipart_upload(bucket, object, &opts).await?;
         Ok((res, idx, opts.expected_bucket_incarnation_id))
     }
 
@@ -704,13 +712,14 @@ impl ECStore {
 
     pub(crate) async fn complete_multipart_upload_for_data_movement(
         self: Arc<Self>,
-        target_pool_idx: usize,
+        target: (usize, Option<&ObjectLockDiagGuard>),
         bucket: &str,
         object: &str,
         upload_id: &str,
         uploaded_parts: Vec<CompletePart>,
         opts: &ObjectOptions,
     ) -> Result<ObjectInfo> {
+        let (target_pool_idx, mutation_fence) = target;
         check_complete_multipart_args(bucket, object, upload_id)?;
         if !opts.data_movement {
             return Err(Error::other("targeted multipart completion requires data_movement options"));
@@ -739,6 +748,8 @@ impl ECStore {
             snapshot.add_lock_fences(&mut opts);
             opts.object_lock_config_snapshot = Some(snapshot);
         }
+        self.apply_decommission_target_mutation_fence(target_pool_idx, object, &mut opts, mutation_fence)
+            .await;
         #[cfg(test)]
         pause_data_movement_multipart_before_selected_completion(bucket).await;
         let pool = self

crates/ecstore/src/store/object.rs

@@ -32,12 +32,13 @@ use crate::bucket::metadata_sys::{
 use crate::bucket::object_lock::objectlock_sys::{
     check_object_lock_for_deletion_with_state, ensure_recursive_force_delete_allowed_for_state,
 };
-use crate::bucket::replication::ReplicationObjectBridge;
+use crate::bucket::replication::{DeleteReplicationConfigSnapshot, ReplicationObjectBridge};
+use crate::bucket::versioning::VersioningApi;
 use crate::disk::OldCurrentSize;
 use crate::object_api::{NamespaceLockFence, ObjectLockConfigSnapshot};
 use crate::set_disk::{
-    get_lock_acquire_timeout, get_object_lock_diag_slow_acquire_threshold, get_object_lock_diag_slow_hold_threshold,
-    is_lock_optimization_enabled, is_object_lock_diag_enabled,
+    SetDisks, get_lock_acquire_timeout, get_object_lock_diag_slow_acquire_threshold, get_object_lock_diag_slow_hold_threshold,
+    is_lock_optimization_enabled, is_object_lock_diag_enabled, same_distributed_lock_domain,
 };
 use crate::storage_api_contracts::{
     namespace::NamespaceLocking as _,
@@ -352,6 +353,8 @@ impl fmt::Display for ObjectLockDiagMode {
 
 pub(crate) struct ObjectLockDiagGuard {
     guard: rustfs_lock::NamespaceLockGuard,
+    #[cfg(test)]
+    test_namespace_lock_fence: Option<NamespaceLockFence>,
     enabled: bool,
     op: &'static str,
     bucket: Option<String>,
@@ -373,6 +376,8 @@ impl ObjectLockDiagGuard {
     ) -> Self {
         Self {
             guard,
+            #[cfg(test)]
+            test_namespace_lock_fence: None,
             enabled,
             op,
             bucket,
@@ -393,6 +398,115 @@ impl ObjectLockDiagGuard {
     pub(crate) fn is_lock_lost(&self) -> bool {
         self.guard.is_lock_lost()
     }
+
+    pub(crate) fn add_namespace_lock_fence(&self, opts: &mut ObjectOptions) {
+        opts.ensure_namespace_lock_fence();
+        if let Some(signal) = self.lock_lost_signal() {
+            opts.add_namespace_lock_lost_signal(signal);
+        }
+        #[cfg(test)]
+        if let Some(fence) = self.test_namespace_lock_fence.as_ref() {
+            opts.add_namespace_lock_fence_for_test(fence);
+        }
+    }
+}
+
+#[cfg(test)]
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub(crate) enum DecommissionMutationFenceTestPhase {
+    Migration,
+    SourceCleanup,
+}
+
+#[cfg(test)]
+struct DecommissionMutationFenceLossState {
+    bucket: String,
+    object: String,
+    phase: DecommissionMutationFenceTestPhase,
+    fence: NamespaceLockFence,
+    loss_handle: Arc<std::sync::atomic::AtomicBool>,
+}
+
+#[cfg(test)]
+pub(crate) struct DecommissionMutationFenceLossHook {
+    state: Arc<DecommissionMutationFenceLossState>,
+}
+
+#[cfg(test)]
+static DECOMMISSION_MUTATION_FENCE_LOSS_HOOK: std::sync::OnceLock<
+    std::sync::Mutex<Option<Arc<DecommissionMutationFenceLossState>>>,
+> = std::sync::OnceLock::new();
+
+#[cfg(test)]
+impl DecommissionMutationFenceLossHook {
+    pub(crate) fn install(bucket: &str, object: &str, phase: DecommissionMutationFenceTestPhase) -> Self {
+        let (fence, loss_handle) = NamespaceLockFence::loss_handle_for_test();
+        let state = Arc::new(DecommissionMutationFenceLossState {
+            bucket: bucket.to_string(),
+            object: object.to_string(),
+            phase,
+            fence,
+            loss_handle,
+        });
+        let mut slot = DECOMMISSION_MUTATION_FENCE_LOSS_HOOK
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("decommission mutation fence loss hooks should not poison");
+        assert!(slot.is_none(), "decommission mutation fence loss hook must be unique");
+        *slot = Some(Arc::clone(&state));
+        Self { state }
+    }
+
+    pub(crate) fn mark_lost(&self) {
+        self.state.loss_handle.store(true, Ordering::Release);
+    }
+}
+
+#[cfg(test)]
+impl Drop for DecommissionMutationFenceLossHook {
+    fn drop(&mut self) {
+        let mut slot = DECOMMISSION_MUTATION_FENCE_LOSS_HOOK
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("decommission mutation fence loss hooks should not poison");
+        if slot.as_ref().is_some_and(|hook| Arc::ptr_eq(hook, &self.state)) {
+            *slot = None;
+        }
+    }
+}
+
+#[cfg(test)]
+fn decommission_mutation_fence_for_test(
+    bucket: &str,
+    object: &str,
+    phase: DecommissionMutationFenceTestPhase,
+) -> Option<NamespaceLockFence> {
+    DECOMMISSION_MUTATION_FENCE_LOSS_HOOK
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("decommission mutation fence loss hooks should not poison")
+        .as_ref()
+        .filter(|hook| hook.bucket == bucket && hook.object == object && hook.phase == phase)
+        .map(|hook| hook.fence.clone())
+}
+
+pub(crate) struct SourceCleanupMutationFence {
+    guard: ObjectLockDiagGuard,
+    source_lock_covered: bool,
+}
+
+impl SourceCleanupMutationFence {
+    pub(crate) fn source_lock_covered(&self) -> bool {
+        self.source_lock_covered
+    }
+
+    pub(crate) fn is_lock_lost(&self) -> bool {
+        self.guard.is_lock_lost()
+    }
+
+    pub(crate) fn add_namespace_lock_fence(&self, opts: &mut ObjectOptions) {
+        self.guard.add_namespace_lock_fence(opts);
+    }
 }
 
 /// Opaque write-lock guard for the RestoreObject accept path; see
@@ -410,10 +524,7 @@ impl RestoreAcceptGuard {
     }
 
     pub fn add_namespace_lock_fence(&self, opts: &mut ObjectOptions) {
-        opts.ensure_namespace_lock_fence();
-        if let Some(signal) = self.0.lock_lost_signal() {
-            opts.add_namespace_lock_lost_signal(signal);
-        }
+        self.0.add_namespace_lock_fence(opts);
     }
 }
 
@@ -690,16 +801,6 @@ impl SelectObjectSnapshotLockLossWake {
     }
 }
 
-// LockRegistry clones its canonical client Arc for each endpoint host, so an
-// exact Arc set identifies one distributed namespace-lock quorum domain.
-fn same_distributed_lock_domain(left: &[Arc<dyn rustfs_lock::LockClient>], right: &[Arc<dyn rustfs_lock::LockClient>]) -> bool {
-    left.iter()
-        .all(|left_client| right.iter().any(|right_client| Arc::ptr_eq(left_client, right_client)))
-        && right
-            .iter()
-            .all(|right_client| left.iter().any(|left_client| Arc::ptr_eq(left_client, right_client)))
-}
-
 impl AsyncRead for SelectObjectSnapshotReader {
     fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut ReadBuf<'_>) -> Poll<std::io::Result<()>> {
         if self.lock_loss_wake.poll_lost(cx) || self.lease.is_lost() {
@@ -805,7 +906,7 @@ fn resolve_latest_object_access(
 }
 
 fn should_create_delete_marker_for_missing_object(opts: &ObjectOptions) -> bool {
-    opts.versioned && opts.version_id.is_none() && !opts.delete_marker && !opts.data_movement
+    (opts.versioned || opts.version_suspended) && opts.version_id.is_none() && !opts.delete_marker && !opts.data_movement
 }
 
 #[cfg(test)]
@@ -813,6 +914,8 @@ struct DeleteAfterObjectLockSnapshotBarrierState {
     bucket: String,
     arrived: tokio::sync::Notify,
     release: tokio::sync::Notify,
+    namespace_pending: tokio::sync::Notify,
+    namespace_acquired: AtomicBool,
 }
 
 #[cfg(test)]
@@ -832,6 +935,8 @@ impl DeleteAfterObjectLockSnapshotBarrier {
             bucket: bucket.to_string(),
             arrived: tokio::sync::Notify::new(),
             release: tokio::sync::Notify::new(),
+            namespace_pending: tokio::sync::Notify::new(),
+            namespace_acquired: AtomicBool::new(false),
         });
         let mut slot = DELETE_AFTER_OBJECT_LOCK_SNAPSHOT_BARRIER
             .get_or_init(|| std::sync::Mutex::new(None))
@@ -849,6 +954,18 @@ impl DeleteAfterObjectLockSnapshotBarrier {
     pub(crate) fn release(&self) {
         self.state.release.notify_one();
     }
+
+    pub(crate) async fn release_and_wait_until_namespace_pending(&self) {
+        let namespace_pending = self.state.namespace_pending.notified();
+        self.release();
+        tokio::time::timeout(Duration::from_secs(5), namespace_pending)
+            .await
+            .expect("delete should proceed to its namespace lock after leaving the snapshot barrier");
+    }
+
+    pub(crate) fn namespace_acquired(&self) -> bool {
+        self.state.namespace_acquired.load(Ordering::Acquire)
+    }
 }
 
 #[cfg(test)]
@@ -873,6 +990,97 @@ async fn pause_delete_after_object_lock_snapshot(bucket: &str) {
         .as_ref()
         .filter(|state| state.bucket == bucket)
         .cloned();
+    if let Some(state) = state {
+        state.arrived.notify_one();
+        state.release.notified().await;
+        state.namespace_pending.notify_one();
+    }
+}
+
+#[cfg(test)]
+fn notify_delete_namespace_acquired(bucket: &str) {
+    let state = DELETE_AFTER_OBJECT_LOCK_SNAPSHOT_BARRIER
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("delete snapshot barrier mutex should not poison")
+        .as_ref()
+        .filter(|state| state.bucket == bucket)
+        .cloned();
+    if let Some(state) = state {
+        state.namespace_acquired.store(true, Ordering::Release);
+    }
+}
+
+#[cfg(test)]
+struct VersionedDeleteMarkerCommitBarrierState {
+    bucket: String,
+    object: String,
+    arrived: tokio::sync::Notify,
+    release: tokio::sync::Notify,
+}
+
+#[cfg(test)]
+pub(crate) struct VersionedDeleteMarkerCommitBarrier {
+    state: Arc<VersionedDeleteMarkerCommitBarrierState>,
+}
+
+#[cfg(test)]
+static VERSIONED_DELETE_MARKER_COMMIT_BARRIER: std::sync::OnceLock<
+    std::sync::Mutex<Option<Arc<VersionedDeleteMarkerCommitBarrierState>>>,
+> = std::sync::OnceLock::new();
+
+#[cfg(test)]
+impl VersionedDeleteMarkerCommitBarrier {
+    pub(crate) fn install(bucket: &str, object: &str) -> Self {
+        let state = Arc::new(VersionedDeleteMarkerCommitBarrierState {
+            bucket: bucket.to_string(),
+            object: object.to_string(),
+            arrived: tokio::sync::Notify::new(),
+            release: tokio::sync::Notify::new(),
+        });
+        let mut slot = VERSIONED_DELETE_MARKER_COMMIT_BARRIER
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("versioned delete-marker commit barrier mutex should not poison");
+        assert!(slot.is_none(), "versioned delete-marker commit barrier must be unique");
+        *slot = Some(Arc::clone(&state));
+        Self { state }
+    }
+
+    pub(crate) async fn wait_until_paused(&self) {
+        tokio::time::timeout(Duration::from_secs(30), self.state.arrived.notified())
+            .await
+            .expect("versioned DELETE should reach the post-marker-commit barrier");
+    }
+
+    pub(crate) fn release(&self) {
+        self.state.release.notify_one();
+    }
+}
+
+#[cfg(test)]
+impl Drop for VersionedDeleteMarkerCommitBarrier {
+    fn drop(&mut self) {
+        self.state.release.notify_one();
+        let mut slot = VERSIONED_DELETE_MARKER_COMMIT_BARRIER
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("versioned delete-marker commit barrier mutex should not poison");
+        if slot.as_ref().is_some_and(|state| Arc::ptr_eq(state, &self.state)) {
+            *slot = None;
+        }
+    }
+}
+
+#[cfg(test)]
+async fn pause_versioned_delete_marker_after_commit(bucket: &str, object: &str) {
+    let state = VERSIONED_DELETE_MARKER_COMMIT_BARRIER
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("versioned delete-marker commit barrier mutex should not poison")
+        .as_ref()
+        .filter(|state| state.bucket == bucket && state.object == object)
+        .cloned();
     if let Some(state) = state {
         state.arrived.notify_one();
         state.release.notified().await;
@@ -913,6 +1121,160 @@ fn writer_pool_lookup_opts(opts: &ObjectOptions, no_lock: bool) -> ObjectOptions
     lookup_opts
 }
 
+fn delete_pool_lookup_opts(opts: &ObjectOptions, no_lock: bool) -> ObjectOptions {
+    let mut lookup_opts = writer_pool_lookup_opts(opts, no_lock);
+    lookup_opts.skip_decommissioned = opts.data_movement;
+    lookup_opts
+}
+
+fn should_delete_from_all_pools(opts: &ObjectOptions, pool_count: usize) -> bool {
+    pool_count > 0 && (!opts.versioned && !opts.version_suspended || opts.version_id.is_some())
+}
+
+fn batch_delete_creates_latest_marker(object: &ObjectToDelete, delete_config_snapshot: &DeleteReplicationConfigSnapshot) -> bool {
+    if object.version_id.is_some() {
+        return false;
+    }
+
+    let object_name = decode_dir_object(&object.object_name);
+    let (versioned, version_suspended) = delete_config_snapshot.versioning_config().delete_state(&object_name);
+    versioned || version_suspended
+}
+
+fn batch_delete_targets_pool(creates_latest_marker: bool, marker_target_pool_idx: Option<usize>, pool_idx: usize) -> bool {
+    !creates_latest_marker || marker_target_pool_idx == Some(pool_idx)
+}
+
+#[cfg(test)]
+struct BatchDeletePoolErrorInjectionState {
+    bucket: String,
+    pool_idx: usize,
+    errors: std::collections::HashMap<String, Error>,
+    observed: std::sync::atomic::AtomicUsize,
+}
+
+#[cfg(test)]
+pub(crate) struct BatchDeletePoolErrorInjection {
+    state: Arc<BatchDeletePoolErrorInjectionState>,
+}
+
+#[cfg(test)]
+static BATCH_DELETE_POOL_ERROR_INJECTION: std::sync::OnceLock<std::sync::Mutex<Option<Arc<BatchDeletePoolErrorInjectionState>>>> =
+    std::sync::OnceLock::new();
+
+#[cfg(test)]
+impl BatchDeletePoolErrorInjection {
+    pub(crate) fn install(bucket: &str, pool_idx: usize, errors: Vec<(String, Error)>) -> Self {
+        let state = Arc::new(BatchDeletePoolErrorInjectionState {
+            bucket: bucket.to_string(),
+            pool_idx,
+            errors: errors.into_iter().collect(),
+            observed: std::sync::atomic::AtomicUsize::new(0),
+        });
+        let mut slot = BATCH_DELETE_POOL_ERROR_INJECTION
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("batch delete pool error injection mutex should not poison");
+        assert!(slot.is_none(), "batch delete pool error injection must be unique");
+        *slot = Some(Arc::clone(&state));
+        Self { state }
+    }
+
+    pub(crate) fn observed(&self) -> usize {
+        self.state.observed.load(Ordering::Acquire)
+    }
+}
+
+#[cfg(test)]
+impl Drop for BatchDeletePoolErrorInjection {
+    fn drop(&mut self) {
+        let mut slot = BATCH_DELETE_POOL_ERROR_INJECTION
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("batch delete pool error injection mutex should not poison");
+        if slot.as_ref().is_some_and(|state| Arc::ptr_eq(state, &self.state)) {
+            *slot = None;
+        }
+    }
+}
+
+#[cfg(test)]
+fn inject_batch_delete_pool_errors(
+    bucket: &str,
+    pool_idx: usize,
+    object_names: &[String],
+    result: &mut (Vec<DeletedObject>, Vec<Option<Error>>),
+) {
+    let state = BATCH_DELETE_POOL_ERROR_INJECTION
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("batch delete pool error injection mutex should not poison")
+        .as_ref()
+        .filter(|state| state.bucket == bucket && state.pool_idx == pool_idx)
+        .cloned();
+    let Some(state) = state else {
+        return;
+    };
+
+    for (idx, object_name) in object_names.iter().enumerate() {
+        let Some(error) = state.errors.get(object_name) else {
+            continue;
+        };
+        if result.1[idx].is_none() && result.0[idx].found {
+            result.1[idx] = Some(error.clone());
+            state.observed.fetch_add(1, Ordering::AcqRel);
+        }
+    }
+}
+
+fn resolve_batch_delete_pool_results<'a>(
+    initial_error: Option<Error>,
+    pool_results: impl IntoIterator<Item = (&'a DeletedObject, &'a Option<Error>)>,
+) -> (Option<DeletedObject>, Option<Error>, bool) {
+    let mut failure = initial_error.map(|err| (None, err));
+    let mut deleted = None;
+    let mut fallback: Option<(DeletedObject, Option<Error>)> = None;
+    let mut attempted = false;
+
+    for (pool_delete, pool_error) in pool_results {
+        attempted = true;
+        match pool_error {
+            Some(err) if is_err_object_not_found(err) || is_err_version_not_found(err) => {
+                if fallback.as_ref().is_none_or(|(_, error)| error.is_none()) {
+                    fallback = Some(((*pool_delete).clone(), Some(err.clone())));
+                }
+            }
+            Some(err) => {
+                if failure.is_none() {
+                    failure = Some((Some((*pool_delete).clone()), err.clone()));
+                }
+            }
+            None if pool_delete.found => {
+                if deleted.is_none() {
+                    deleted = Some((*pool_delete).clone());
+                }
+            }
+            None => {
+                if fallback.is_none() {
+                    fallback = Some(((*pool_delete).clone(), None));
+                }
+            }
+        }
+    }
+
+    if let Some((failed_delete, err)) = failure {
+        return (failed_delete, Some(err), attempted);
+    }
+    if let Some(deleted) = deleted {
+        return (Some(deleted), None, attempted);
+    }
+    if let Some((deleted, err)) = fallback {
+        return (Some(deleted), err, attempted);
+    }
+
+    (None, None, attempted)
+}
+
 fn transition_restore_pool_opts(opts: &ObjectOptions) -> ObjectOptions {
     let mut lookup_opts = opts.clone();
     lookup_opts.skip_decommissioned = true;
@@ -1533,6 +1895,89 @@ impl ECStore {
         )))
     }
 
+    pub(crate) async fn acquire_decommission_object_mutation_fence(
+        &self,
+        bucket: &str,
+        object: &str,
+    ) -> Result<ObjectLockDiagGuard> {
+        if self.ctx.lock_manager().is_disabled() {
+            return Err(Error::other("decommission object migration requires namespace locking"));
+        }
+
+        #[cfg(test)]
+        let test_namespace_lock_fence =
+            decommission_mutation_fence_for_test(bucket, object, DecommissionMutationFenceTestPhase::Migration);
+        let object = encode_dir_object(object);
+        let mut opts = ObjectOptions::default();
+        let guard = self
+            .acquire_object_read_lock_if_needed("decommission_object", bucket, &object, &mut opts)
+            .await?
+            .ok_or_else(|| Error::other("decommission object migration failed to acquire its namespace fence"))?;
+        #[cfg(test)]
+        let guard = {
+            let mut guard = guard;
+            guard.test_namespace_lock_fence = test_namespace_lock_fence;
+            guard
+        };
+        Ok(guard)
+    }
+
+    pub(super) async fn apply_decommission_target_mutation_fence(
+        &self,
+        target_pool_idx: usize,
+        object: &str,
+        opts: &mut ObjectOptions,
+        mutation_fence: Option<&ObjectLockDiagGuard>,
+    ) {
+        let Some(mutation_fence) = mutation_fence else {
+            return;
+        };
+
+        mutation_fence.add_namespace_lock_fence(opts);
+        let fixed_set = self.pools.first().and_then(|pool| pool.disk_set.first());
+        let target_set = self.pools.get(target_pool_idx).map(|pool| pool.get_disks_by_key(object));
+        opts.no_lock = match (fixed_set, target_set) {
+            (Some(fixed), Some(target)) => fixed.shares_namespace_lock_domain(&target).await,
+            _ => false,
+        };
+    }
+
+    pub(crate) async fn acquire_decommission_source_cleanup_fence(
+        &self,
+        bucket: &str,
+        object: &str,
+        source_set: &SetDisks,
+    ) -> Result<SourceCleanupMutationFence> {
+        if self.ctx.lock_manager().is_disabled() {
+            return Err(Error::other("decommission source cleanup requires namespace locking"));
+        }
+
+        #[cfg(test)]
+        crate::data_movement::notify_source_cleanup_mutation_fence_pending(bucket, object);
+        #[cfg(test)]
+        let test_namespace_lock_fence =
+            decommission_mutation_fence_for_test(bucket, object, DecommissionMutationFenceTestPhase::SourceCleanup);
+        let object = encode_dir_object(object);
+        let fixed_set = Arc::clone(&self.pools[0].disk_set[0]);
+        let source_lock_covered = fixed_set.shares_namespace_lock_domain(source_set).await;
+        // Lock order: fixed store mutation domain first; source cleanup takes its
+        // hashed source-domain lock second only when this guard does not cover it.
+        let guard = self
+            .acquire_object_write_lock("decommission_source_cleanup", bucket, &object)
+            .await?;
+        #[cfg(test)]
+        let guard = {
+            let mut guard = guard;
+            guard.test_namespace_lock_fence = test_namespace_lock_fence;
+            guard
+        };
+
+        Ok(SourceCleanupMutationFence {
+            guard,
+            source_lock_covered,
+        })
+    }
+
     pub(crate) async fn acquire_all_object_read_locks(
         &self,
         op: &'static str,
@@ -1986,14 +2431,17 @@ impl ECStore {
         object: &str,
         data: &mut PutObjReader,
         opts: &ObjectOptions,
+        mutation_fence: Option<&ObjectLockDiagGuard>,
     ) -> Result<(usize, Result<ObjectInfo>)> {
         if !opts.data_movement {
             return Err(Error::other("data movement PUT requires data_movement options"));
         }
-        let (object, opts) = self.prepare_put_object(bucket, object, opts).await?;
+        let (object, mut opts) = self.prepare_put_object(bucket, object, opts).await?;
         let idx = self
             .select_put_object_pool_idx(bucket, object.as_str(), data.size(), &opts)
             .await?;
+        self.apply_decommission_target_mutation_fence(idx, object.as_str(), &mut opts, mutation_fence)
+            .await;
         let result = self.pools[idx]
             .put_object_with_old_current_size(bucket, &object, data, &opts)
             .await
@@ -2446,6 +2894,10 @@ impl ECStore {
         } else {
             None
         };
+        #[cfg(test)]
+        if _object_lock_guard.is_some() {
+            notify_delete_namespace_acquired(bucket);
+        }
         if let Some(trigger) = opts.lifecycle_delete_all.as_ref() {
             let configs = delete_all_configs.as_ref().ok_or(StorageError::PreconditionFailed)?;
             let expected_bucket_incarnation_id = opts.expected_bucket_incarnation_id.ok_or(StorageError::PreconditionFailed)?;
@@ -2479,7 +2931,7 @@ impl ECStore {
             return Ok(ObjectInfo::default());
         }
 
-        let gopts = writer_pool_lookup_opts(&opts, true);
+        let gopts = delete_pool_lookup_opts(&opts, true);
 
         if opts.data_movement {
             let existing_pool_info = self.get_pool_info_existing_with_opts(bucket, object, &gopts).await;
@@ -2584,6 +3036,8 @@ impl ECStore {
             Err(err) if is_err_object_not_found(&err) && should_create_delete_marker_for_missing_object(&opts) => {
                 let target_pool_idx = self.get_pool_idx_no_lock(bucket, object, 0).await?;
                 let mut obj = self.pools[target_pool_idx].delete_object(bucket, object, opts).await?;
+                #[cfg(test)]
+                pause_versioned_delete_marker_after_commit(bucket, object).await;
                 obj.name = decode_dir_object(object);
                 return Ok(obj);
             }
@@ -2622,7 +3076,7 @@ impl ECStore {
             None
         };
 
-        if !errs.is_empty() && !opts.versioned && !opts.version_suspended {
+        if should_delete_from_all_pools(&opts, errs.len()) {
             let mut obj = match self.delete_object_from_all_pools(bucket, object, &opts, errs).await {
                 Ok(obj) => obj,
                 Err(err) => {
@@ -2646,6 +3100,8 @@ impl ECStore {
 
             match pool.delete_object(bucket, object, opts.clone()).await {
                 Ok(res) => {
+                    #[cfg(test)]
+                    pause_versioned_delete_marker_after_commit(bucket, object).await;
                     if let (Some(api), Some(je)) = (tier_journal_api.as_ref(), journal_entry.as_ref()) {
                         commit_prepared_tier_delete_journal_entry(api, je).await;
                     }
@@ -2776,30 +3232,104 @@ impl ECStore {
             Ok(guards) => guards,
             Err(err) => return return_batch_delete_lock_error(objects.as_slice(), err),
         };
+        #[cfg(test)]
+        if !_object_lock_guards.is_empty() {
+            notify_delete_namespace_acquired(bucket);
+        }
+
+        let delete_config_snapshot = opts
+            .delete_replication_config_snapshot
+            .as_deref()
+            .expect("batch delete replication config snapshot should be loaded");
+        let latest_marker_objects = objects
+            .iter()
+            .map(|object| batch_delete_creates_latest_marker(object, delete_config_snapshot))
+            .collect::<Vec<_>>();
+        let marker_target_results = join_all(objects.iter().zip(&latest_marker_objects).map(
+            |(object, creates_marker)| async move {
+                if *creates_marker {
+                    Some(self.get_pool_idx_no_lock(bucket, &object.object_name, 0).await)
+                } else {
+                    None
+                }
+            },
+        ))
+        .await;
+        let mut marker_target_pool_indices = Vec::with_capacity(objects.len());
+        for (idx, target_result) in marker_target_results.into_iter().enumerate() {
+            match target_result {
+                Some(Ok(pool_idx)) => marker_target_pool_indices.push(Some(pool_idx)),
+                Some(Err(err)) => {
+                    del_errs[idx] = Some(err);
+                    marker_target_pool_indices.push(None);
+                }
+                None => marker_target_pool_indices.push(None),
+            }
+        }
 
         let mut futures = Vec::with_capacity(self.pools.len());
-
         for pool in self.pools.iter() {
             if self.is_pool_rebalancing(pool.pool_idx).await {
                 continue;
             }
-            futures.push(pool.delete_objects(bucket, objects.clone(), opts.clone()));
+
+            let (object_indices, pool_objects): (Vec<_>, Vec<_>) = objects
+                .iter()
+                .enumerate()
+                .filter(|(idx, _)| {
+                    batch_delete_targets_pool(latest_marker_objects[*idx], marker_target_pool_indices[*idx], pool.pool_idx)
+                })
+                .map(|(idx, object)| (idx, object.clone()))
+                .unzip();
+            if pool_objects.is_empty() {
+                continue;
+            }
+
+            let pool_opts = opts.clone();
+            futures.push(async move {
+                #[cfg(test)]
+                let pool_object_names = pool_objects
+                    .iter()
+                    .map(|object| object.object_name.clone())
+                    .collect::<Vec<_>>();
+                let result = pool.delete_objects(bucket, pool_objects, pool_opts).await;
+                #[cfg(test)]
+                let result = {
+                    let mut result = result;
+                    inject_batch_delete_pool_errors(bucket, pool.pool_idx, &pool_object_names, &mut result);
+                    result
+                };
+                (object_indices, result)
+            });
         }
 
         let results = join_all(futures).await;
 
         for idx in 0..del_objects.len() {
-            for (dels, errs) in results.iter() {
-                if errs[idx].is_none() && dels[idx].found {
-                    del_errs[idx] = None;
-                    del_objects[idx] = dels[idx].clone();
-                    break;
-                }
+            let pool_results = results.iter().filter_map(|(object_indices, (dels, errs))| {
+                let pool_object_idx = object_indices.binary_search(&idx).ok()?;
+                Some((&dels[pool_object_idx], &errs[pool_object_idx]))
+            });
+            let (deleted, error, attempted) = resolve_batch_delete_pool_results(del_errs[idx].take(), pool_results);
+            if let Some(deleted) = deleted {
+                del_objects[idx] = deleted;
+            }
+            del_errs[idx] = error;
 
-                if del_errs[idx].is_none() {
-                    del_errs[idx] = errs[idx].clone();
-                    del_objects[idx] = dels[idx].clone();
-                }
+            if !attempted && del_errs[idx].is_none() && latest_marker_objects[idx] {
+                del_objects[idx] = DeletedObject {
+                    object_name: objects[idx].object_name.clone(),
+                    version_id: objects[idx].version_id,
+                    ..Default::default()
+                };
+                del_errs[idx] = Some(StorageError::ObjectNotFound(bucket.to_owned(), objects[idx].object_name.clone()));
+            }
+        }
+
+        #[cfg(test)]
+        for (idx, object) in objects.iter().enumerate() {
+            if del_errs[idx].is_none() && del_objects[idx].delete_marker {
+                pause_versioned_delete_marker_after_commit(bucket, &object.object_name).await;
             }
         }
 
@@ -3374,6 +3904,80 @@ mod tests {
         assert!(!same_distributed_lock_domain(&[first, second], &[other]));
     }
 
+    #[tokio::test]
+    async fn decommission_fence_covers_dist_sets_with_same_clients_despite_different_namespaces() {
+        let ctx = Arc::new(crate::runtime::instance::InstanceContext::new());
+        let (_dirs, original_sets) = make_local_two_set_sets_with_ctx(Arc::clone(&ctx)).await;
+        let mut second_set = (*original_sets.disk_set[1]).clone();
+        second_set.lockers = original_sets.disk_set[0].lockers.clone();
+        let mut sets = (*original_sets).clone();
+        sets.disk_set[1] = Arc::new(second_set);
+        let sets = Arc::new(sets);
+        ctx.update_erasure_type(SetupType::DistErasure).await;
+
+        assert!(
+            sets.disk_set[0]
+                .lockers
+                .iter()
+                .zip(&sets.disk_set[1].lockers)
+                .all(|(fixed, hashed)| Arc::ptr_eq(fixed, hashed)),
+            "the regression requires identical distributed lock clients"
+        );
+        assert_ne!(sets.disk_set[0].set_index, sets.disk_set[1].set_index);
+
+        let pool_config = sets.endpoints.clone();
+        let store = new_prepared_reader_test_store_from_pools(vec![Arc::clone(&sets)], vec![pool_config], ctx);
+        let object = (0..1_000)
+            .map(|index| format!("decommission-dist-domain-{index}.bin"))
+            .find(|candidate| Arc::ptr_eq(&sets.get_disks_by_key(candidate), &sets.disk_set[1]))
+            .expect("a key should hash to the second set namespace");
+        let mutation_fence = store
+            .acquire_decommission_object_mutation_fence("bucket", &object)
+            .await
+            .expect("the fixed distributed mutation fence should be acquired");
+        let target_lock = sets.disk_set[1]
+            .new_ns_lock("bucket", &object)
+            .await
+            .expect("the hashed-set namespace lock should be created");
+        let target_err = target_lock
+            .get_write_lock(Duration::from_millis(50))
+            .await
+            .expect_err("the fixed read fence must conflict through the shared clients");
+        assert!(matches!(target_err, rustfs_lock::LockError::Timeout { .. }));
+
+        let mut put_opts = ObjectOptions::default();
+        store
+            .apply_decommission_target_mutation_fence(0, &object, &mut put_opts, Some(&mutation_fence))
+            .await;
+        assert!(put_opts.no_lock, "migration target PUT must reuse the covering fixed fence");
+
+        let mut multipart_opts = ObjectOptions::default();
+        store
+            .apply_decommission_target_mutation_fence(0, &object, &mut multipart_opts, Some(&mutation_fence))
+            .await;
+        assert!(multipart_opts.no_lock, "migration target multipart must reuse the covering fixed fence");
+        drop(mutation_fence);
+
+        let cleanup_object = (0..1_000)
+            .map(|index| format!("decommission-dist-cleanup-{index}.bin"))
+            .find(|candidate| Arc::ptr_eq(&sets.get_disks_by_key(candidate), &sets.disk_set[1]))
+            .expect("a cleanup key should hash to the second set namespace");
+        let source_fence = store
+            .acquire_decommission_source_cleanup_fence("bucket", &cleanup_object, sets.disk_set[1].as_ref())
+            .await
+            .expect("the fixed distributed cleanup fence should be acquired");
+        assert!(source_fence.source_lock_covered(), "source cleanup must reuse the covering fixed fence");
+        let source_lock = sets.disk_set[1]
+            .new_ns_lock("bucket", &cleanup_object)
+            .await
+            .expect("the source-set namespace lock should be created");
+        let source_err = source_lock
+            .get_read_lock(Duration::from_millis(50))
+            .await
+            .expect_err("the fixed write fence must conflict through the shared clients");
+        assert!(matches!(source_err, rustfs_lock::LockError::Timeout { .. }));
+    }
+
     #[test]
     fn select_snapshot_version_matching_normalizes_null_and_uuid_forms() {
         let nil = Uuid::nil();
@@ -4433,6 +5037,159 @@ mod tests {
         assert_eq!(lookup_opts.version_id.as_deref(), Some("vid-1"));
     }
 
+    #[test]
+    fn ordinary_delete_lookup_includes_decommission_source_and_skips_rebalance_source() {
+        let lookup_opts = delete_pool_lookup_opts(&ObjectOptions::default(), true);
+
+        assert!(lookup_opts.no_lock);
+        assert!(!lookup_opts.skip_decommissioned);
+        assert!(lookup_opts.skip_rebalancing);
+
+        let explicit_version = delete_pool_lookup_opts(
+            &ObjectOptions {
+                versioned: true,
+                version_id: Some(uuid::Uuid::new_v4().to_string()),
+                ..Default::default()
+            },
+            true,
+        );
+        assert!(!explicit_version.skip_decommissioned);
+    }
+
+    #[test]
+    fn delete_fans_out_for_unversioned_and_explicit_version_mutations() {
+        assert!(should_delete_from_all_pools(&ObjectOptions::default(), 1));
+        assert!(should_delete_from_all_pools(
+            &ObjectOptions {
+                versioned: true,
+                version_id: Some(uuid::Uuid::new_v4().to_string()),
+                ..Default::default()
+            },
+            2,
+        ));
+        assert!(!should_delete_from_all_pools(
+            &ObjectOptions {
+                versioned: true,
+                ..Default::default()
+            },
+            1,
+        ));
+        assert!(!should_delete_from_all_pools(&ObjectOptions::default(), 0));
+    }
+
+    #[test]
+    fn batch_delete_identifies_only_latest_versioned_markers() {
+        let versioned = DeleteReplicationConfigSnapshot::from_configs_for_test(
+            s3s::dto::VersioningConfiguration {
+                status: Some(s3s::dto::BucketVersioningStatus::from_static(s3s::dto::BucketVersioningStatus::ENABLED)),
+                ..Default::default()
+            },
+            None,
+        );
+        let latest = ObjectToDelete {
+            object_name: "latest".to_string(),
+            ..Default::default()
+        };
+        assert!(batch_delete_creates_latest_marker(&latest, &versioned));
+        assert!(!batch_delete_targets_pool(true, Some(1), 0));
+        assert!(batch_delete_targets_pool(true, Some(1), 1));
+        assert!(!batch_delete_targets_pool(true, Some(1), 2));
+
+        let explicit = ObjectToDelete {
+            object_name: "explicit".to_string(),
+            version_id: Some(uuid::Uuid::new_v4()),
+            ..Default::default()
+        };
+        assert!(!batch_delete_creates_latest_marker(&explicit, &versioned));
+        assert!(batch_delete_targets_pool(false, Some(1), 0));
+
+        let unversioned = DeleteReplicationConfigSnapshot::default();
+        assert!(!batch_delete_creates_latest_marker(&latest, &unversioned));
+        assert!(batch_delete_targets_pool(false, None, 0));
+    }
+
+    #[test]
+    fn batch_delete_pool_failures_override_success_in_any_pool_order() {
+        let success = DeletedObject {
+            object_name: "object".to_string(),
+            found: true,
+            ..Default::default()
+        };
+        let source_errors = [
+            StorageError::ErasureWriteQuorum,
+            StorageError::NamespaceLockQuorumUnavailable {
+                mode: "delete_objects_commit",
+                bucket: "bucket".to_string(),
+                object: "object".to_string(),
+                required: 1,
+                achieved: 0,
+            },
+        ];
+
+        for source_error in source_errors {
+            for source_first in [true, false] {
+                let failed = (DeletedObject::default(), Some(source_error.clone()));
+                let succeeded = (success.clone(), None);
+                let pool_results = if source_first {
+                    vec![failed, succeeded]
+                } else {
+                    vec![succeeded, failed]
+                };
+
+                let (_, error, attempted) =
+                    resolve_batch_delete_pool_results(None, pool_results.iter().map(|(deleted, error)| (deleted, error)));
+
+                assert!(attempted);
+                assert_eq!(error, Some(source_error.clone()));
+            }
+        }
+    }
+
+    #[test]
+    fn batch_delete_ignores_missing_pool_only_after_another_pool_succeeds() {
+        let success = DeletedObject {
+            object_name: "object".to_string(),
+            found: true,
+            ..Default::default()
+        };
+        let missing_errors = [
+            StorageError::ObjectNotFound("bucket".to_string(), "object".to_string()),
+            StorageError::VersionNotFound("bucket".to_string(), "object".to_string(), "version".to_string()),
+        ];
+
+        for missing_error in missing_errors {
+            let missing = (DeletedObject::default(), Some(missing_error.clone()));
+            for missing_first in [true, false] {
+                let succeeded = (success.clone(), None);
+                let pool_results = if missing_first {
+                    vec![missing.clone(), succeeded]
+                } else {
+                    vec![succeeded, missing.clone()]
+                };
+                let (deleted, error, attempted) =
+                    resolve_batch_delete_pool_results(None, pool_results.iter().map(|(deleted, error)| (deleted, error)));
+
+                assert!(attempted);
+                let deleted = deleted.expect("successful pool result should be retained");
+                assert!(deleted.found);
+                assert_eq!(deleted.object_name, success.object_name.as_str());
+                assert!(error.is_none());
+            }
+
+            let missing_only = [missing];
+            let (_, error, attempted) =
+                resolve_batch_delete_pool_results(None, missing_only.iter().map(|(deleted, error)| (deleted, error)));
+            assert!(attempted);
+            assert_eq!(error, Some(missing_error));
+        }
+
+        let silent_missing = [(DeletedObject::default(), None)];
+        let (_, error, attempted) =
+            resolve_batch_delete_pool_results(None, silent_missing.iter().map(|(deleted, error)| (deleted, error)));
+        assert!(attempted);
+        assert!(error.is_none());
+    }
+
     #[test]
     fn data_movement_pool_lookup_opts_keeps_no_lock_for_tiered_moves() {
         let lookup_opts = data_movement_pool_lookup_opts(

crates/ecstore/src/store/rebalance/support.rs

@@ -73,7 +73,7 @@ pub(super) fn resolve_rebalance_delete_from_all_pools_result(
     object: &str,
 ) -> Result<ObjectInfo> {
     result.map_err(|err| {
-        if err == Error::PreconditionFailed {
+        if matches!(&err, Error::PreconditionFailed | Error::PrefixAccessDenied(_, _)) {
             err
         } else {
             Error::other(format!("failed to delete rebalance source object {bucket}/{object}: {err}"))
@@ -86,7 +86,7 @@ fn is_ignorable_rebalance_delete_error(err: &Error) -> bool {
 }
 
 fn rebalance_delete_pool_error(pool_idx: usize, bucket: &str, object: &str, err: Error) -> Error {
-    if err == Error::PreconditionFailed {
+    if matches!(&err, Error::PreconditionFailed | Error::PrefixAccessDenied(_, _)) {
         err
     } else {
         Error::other(format!("pool {pool_idx} delete failed for {bucket}/{object}: {err}"))
@@ -191,6 +191,18 @@ mod tests {
         assert_eq!(err, Error::PreconditionFailed);
     }
 
+    #[test]
+    fn rebalance_delete_result_preserves_prefix_access_denied() {
+        let err = resolve_rebalance_delete_from_all_pools_result(
+            Err(Error::PrefixAccessDenied("bucket".to_owned(), "object".to_owned())),
+            "bucket",
+            "object",
+        )
+        .expect_err("prefix access denial should remain structured");
+
+        assert_eq!(err, Error::PrefixAccessDenied("bucket".to_owned(), "object".to_owned()));
+    }
+
     #[test]
     fn rebalance_delete_pool_result_preserves_precondition_failed() {
         let err = resolve_rebalance_delete_from_all_pools_results(
@@ -205,4 +217,19 @@ mod tests {
 
         assert_eq!(err, Error::PreconditionFailed);
     }
+
+    #[test]
+    fn rebalance_delete_pool_result_preserves_prefix_access_denied() {
+        let err = resolve_rebalance_delete_from_all_pools_results(
+            vec![RebalanceDeletePoolResult {
+                pool_idx: 0,
+                result: Err(Error::PrefixAccessDenied("bucket".to_owned(), "object".to_owned())),
+            }],
+            "bucket",
+            "object",
+        )
+        .expect_err("prefix access denial should remain structured");
+
+        assert_eq!(err, Error::PrefixAccessDenied("bucket".to_owned(), "object".to_owned()));
+    }
 }

crates/filemeta/src/metacache.rs

@@ -21,7 +21,6 @@ use arc_swap::ArcSwapOption;
 use rmp::Marker;
 use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
-use std::collections::{HashMap, HashSet};
 use std::str::from_utf8;
 use std::{
     fmt::Debug,
@@ -38,10 +37,8 @@ use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
 use tokio::spawn;
 use tokio::sync::Mutex;
 use tracing::{debug, warn};
-use uuid::Uuid;
 
 const SLASH_SEPARATOR: &str = "/";
-pub const MAX_META_CACHE_HEAL_CANDIDATES: usize = 1024;
 
 #[derive(Clone, Debug, Default)]
 pub struct MetadataResolutionParams {
@@ -69,41 +66,6 @@ pub struct MetaCacheEntry {
     pub reusable: bool,
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
-pub enum MetaCacheHealCandidateKind {
-    Object,
-    DeleteMarker,
-    UnversionedObject,
-}
-
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
-pub struct MetaCacheHealCandidate {
-    pub object: String,
-    pub version_id: Option<Uuid>,
-    pub kind: MetaCacheHealCandidateKind,
-    /// Number of raw disk entries that carried this validated version.
-    pub replica_count: usize,
-}
-
-impl MetaCacheHealCandidate {
-    pub fn validated_version(&self) -> Option<Uuid> {
-        match self.kind {
-            MetaCacheHealCandidateKind::Object | MetaCacheHealCandidateKind::DeleteMarker => self.version_id,
-            MetaCacheHealCandidateKind::UnversionedObject => None,
-        }
-    }
-
-    pub fn is_unversioned(&self) -> bool {
-        self.kind == MetaCacheHealCandidateKind::UnversionedObject
-    }
-}
-
-#[derive(Clone, Debug, Default, PartialEq, Eq)]
-pub struct MetaCacheHealDiscovery {
-    pub candidates: Vec<MetaCacheHealCandidate>,
-    pub unverified_count: usize,
-}
-
 impl MetaCacheEntry {
     pub fn marshal_msg(&self) -> Result<Vec<u8>> {
         let mut wr = Vec::new();
@@ -408,176 +370,6 @@ impl MetaCacheEntries {
         })
     }
 
-    /// Discover validated object/delete-marker versions and safe unversioned
-    /// inspection candidates in the raw entries without applying read quorum.
-    /// This is intentionally separate from [`Self::resolve`]: a sub-quorum
-    /// version is a valid heal target even though it must not participate in
-    /// normal reads or writes.
-    ///
-    /// The validated list is bounded and deduplicated by object, version id,
-    /// and metadata kind; each candidate retains the number of raw disk
-    /// entries that carried it so callers can classify sub-quorum versions.
-    /// Entries whose xl.meta cannot be decoded are counted separately for
-    /// discovery accounting; they never become versionless destructive heal
-    /// requests and do not consume the validated quota. An
-    /// [`MetaCacheHealCandidateKind::UnversionedObject`] is always consumed by
-    /// a non-destructive scanner request.
-    pub fn discover_heal_candidates(&self, bucket: &str, max_candidates: usize) -> MetaCacheHealDiscovery {
-        let limit = max_candidates.min(MAX_META_CACHE_HEAL_CANDIDATES);
-        if limit == 0 || bucket.is_empty() {
-            return MetaCacheHealDiscovery::default();
-        }
-
-        let mut discovery = MetaCacheHealDiscovery {
-            candidates: Vec::<MetaCacheHealCandidate>::with_capacity(limit.min(self.0.len())),
-            unverified_count: 0,
-        };
-        let mut seen: HashMap<(String, Option<Uuid>, MetaCacheHealCandidateKind), usize> =
-            HashMap::with_capacity(limit.min(self.0.len()));
-
-        for entry in self.0.iter().flatten() {
-            if !valid_heal_candidate_name(bucket, entry) {
-                continue;
-            }
-
-            let meta = match FileMeta::load(&entry.metadata) {
-                Ok(meta) => meta,
-                Err(_) => {
-                    discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                    continue;
-                }
-            };
-            let mut entry_seen = HashSet::new();
-
-            for shallow in meta.versions {
-                let version = match shallow.parse_version_meta() {
-                    Ok(version) if version.valid() => version,
-                    Ok(_) | Err(_) => {
-                        discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                        continue;
-                    }
-                };
-                if version.free_version() {
-                    continue;
-                }
-
-                let payload_header = version.header();
-                if normalize_version_id(shallow.header.version_id) != normalize_version_id(payload_header.version_id)
-                    || shallow.header.version_type != payload_header.version_type
-                {
-                    discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                    continue;
-                }
-
-                let (kind, version_id) = match version.version_type {
-                    VersionType::Object
-                        if version.object.is_some() && version.delete_marker.is_none() && version.legacy_object.is_none() =>
-                    {
-                        match version.object.as_ref().and_then(|object| object.version_id) {
-                            Some(id) if !id.is_nil() => (MetaCacheHealCandidateKind::Object, Some(id)),
-                            Some(_) | None => (MetaCacheHealCandidateKind::UnversionedObject, None),
-                        }
-                    }
-                    VersionType::Delete
-                        if version.delete_marker.is_some() && version.object.is_none() && version.legacy_object.is_none() =>
-                    {
-                        let Some(id) = version.delete_marker.as_ref().and_then(|marker| marker.version_id) else {
-                            discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                            continue;
-                        };
-                        if id.is_nil() {
-                            discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                            continue;
-                        }
-                        (MetaCacheHealCandidateKind::DeleteMarker, Some(id))
-                    }
-                    VersionType::Legacy
-                        if version.legacy_object.is_some() && version.object.is_none() && version.delete_marker.is_none() =>
-                    {
-                        let Some(legacy) = version.legacy_object.as_ref() else {
-                            continue;
-                        };
-                        if legacy.version_id.is_empty() {
-                            (MetaCacheHealCandidateKind::UnversionedObject, None)
-                        } else {
-                            let Ok(id) = Uuid::parse_str(&legacy.version_id) else {
-                                discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                                continue;
-                            };
-                            if id.is_nil() {
-                                discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                                continue;
-                            }
-                            (MetaCacheHealCandidateKind::Object, Some(id))
-                        }
-                    }
-                    _ => {
-                        discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                        continue;
-                    }
-                };
-
-                if normalize_version_id(payload_header.version_id) != version_id {
-                    discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                    continue;
-                }
-
-                // `all_parts=true` is the trust-boundary check for versioned
-                // candidates. A null/legacy object may still need the old
-                // non-destructive inspection fallback when its part arrays
-                // are parseable but incomplete; never use that fallback for
-                // a candidate carrying a real version id.
-                let file_info = match version.clone().into_fileinfo(bucket, &entry.name, true) {
-                    Ok(file_info) => file_info,
-                    Err(_) if version_id.is_none() && matches!(kind, MetaCacheHealCandidateKind::UnversionedObject) => {
-                        discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                        match version.into_fileinfo(bucket, &entry.name, false) {
-                            Ok(file_info) => file_info,
-                            Err(_) => continue,
-                        }
-                    }
-                    Err(_) => {
-                        discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                        continue;
-                    }
-                };
-                if file_info.volume != bucket || file_info.name != entry.name {
-                    discovery.unverified_count = discovery.unverified_count.saturating_add(1);
-                    continue;
-                }
-
-                let candidate = MetaCacheHealCandidate {
-                    object: entry.name.clone(),
-                    version_id,
-                    kind,
-                    replica_count: 1,
-                };
-                let key = (candidate.object.clone(), candidate.version_id, candidate.kind.clone());
-                if !entry_seen.contains(&key) {
-                    // Keep per-entry dedupe bounded as well as the global
-                    // candidate union. Once the cap is reached, only keys
-                    // already present in the global map may update replica
-                    // counts; novel versions are accounting-only.
-                    if entry_seen.len() >= limit && !seen.contains_key(&key) {
-                        continue;
-                    }
-                    entry_seen.insert(key.clone());
-                }
-                if let Some(index) = seen.get(&key).copied() {
-                    discovery.candidates[index].replica_count = discovery.candidates[index].replica_count.saturating_add(1);
-                } else {
-                    seen.insert(key, discovery.candidates.len());
-                    discovery.candidates.push(candidate);
-                    if discovery.candidates.len() >= limit {
-                        return discovery;
-                    }
-                }
-            }
-        }
-
-        discovery
-    }
-
     fn resolve_inner(&self, mut params: MetadataResolutionParams, enforce_write_quorum: bool) -> Option<MetaCacheEntry> {
         if self.0.is_empty() {
             debug!(
@@ -754,28 +546,6 @@ impl MetaCacheEntries {
     }
 }
 
-fn valid_heal_candidate_name(bucket: &str, entry: &MetaCacheEntry) -> bool {
-    if bucket.is_empty() || entry.name.is_empty() || entry.is_dir() || entry.name.contains('\0') {
-        return false;
-    }
-
-    // Validate raw key components without normalizing them. A dot component
-    // could otherwise escape the bucket when the key is later mapped back to
-    // a disk path; a final empty component is retained for valid keys ending
-    // in '/'.
-    let mut components = entry.name.split('/').peekable();
-    while let Some(component) = components.next() {
-        if component == "." || component == ".." || (component.is_empty() && components.peek().is_some()) {
-            return false;
-        }
-    }
-    true
-}
-
-fn normalize_version_id(version_id: Option<Uuid>) -> Option<Uuid> {
-    version_id.filter(|id| !id.is_nil())
-}
-
 #[derive(Debug, Default)]
 pub struct MetaCacheEntriesSortedResult {
     pub entries: Option<MetaCacheEntriesSorted>,
@@ -1221,7 +991,7 @@ impl<T: Clone + Debug + Send + Sync + 'static> Cache<T> {
 mod tests {
     use super::*;
     use crate::test_data::create_real_xlmeta;
-    use crate::{FileMetaVersion, MetaDeleteMarker, MetaObjectV1, MetaObjectV1Erasure, MetaObjectV1Stat, TRANSITION_COMPLETE};
+    use crate::{FileMetaVersion, MetaDeleteMarker, TRANSITION_COMPLETE};
     use std::collections::HashMap;
     use std::io::Cursor;
     use std::sync::{
@@ -1822,277 +1592,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn discover_heal_candidates_keeps_sub_quorum_versions_and_deduplicates() {
-        let now = OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp");
-        let entries = MetaCacheEntries(vec![
-            Some(metacache_entry_single_version(1, now, "one")),
-            Some(metacache_entry_single_version(2, now, "two")),
-            Some(metacache_entry_single_version(2, now, "two")),
-            Some(metacache_entry_single_version(3, now, "three")),
-        ]);
-
-        let discovery = entries.discover_heal_candidates("bucket", 16);
-        let ids: std::collections::HashSet<Uuid> = discovery
-            .candidates
-            .iter()
-            .filter_map(|candidate| candidate.version_id)
-            .collect();
-        assert_eq!(
-            ids,
-            [Uuid::from_u128(1), Uuid::from_u128(2), Uuid::from_u128(3)]
-                .into_iter()
-                .collect()
-        );
-        assert_eq!(discovery.candidates.len(), 3, "duplicate tied versions must be emitted once");
-        assert_eq!(
-            discovery
-                .candidates
-                .iter()
-                .find(|candidate| candidate.version_id == Some(Uuid::from_u128(2)))
-                .expect("duplicate version should be discovered")
-                .replica_count,
-            2
-        );
-    }
-
-    #[test]
-    fn discover_heal_candidates_covers_divergent_quorum_boundaries_n2_n4_n6() {
-        let now = OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp");
-
-        for (disk_count, quorum) in [(2usize, 1usize), (4, 2), (6, 3)] {
-            let target_id = Uuid::from_u128(0x1000 + disk_count as u128);
-            for target_replicas in [quorum.saturating_sub(1), quorum, quorum + 1] {
-                let entries = (0..disk_count)
-                    .map(|disk| {
-                        let version_id = if disk < target_replicas {
-                            target_id
-                        } else {
-                            Uuid::from_u128(0x2000 + disk as u128)
-                        };
-                        Some(metacache_entry_single_version(version_id.as_u128(), now, "divergent"))
-                    })
-                    .collect();
-                let discovery = MetaCacheEntries(entries).discover_heal_candidates("bucket", 32);
-                let target = discovery
-                    .candidates
-                    .iter()
-                    .find(|candidate| candidate.version_id == Some(target_id));
-                assert_eq!(target.is_some(), target_replicas > 0, "N={disk_count}, replicas={target_replicas}");
-                if let Some(target) = target {
-                    assert_eq!(target.replica_count, target_replicas);
-                }
-            }
-        }
-    }
-
-    #[test]
-    fn discover_heal_candidates_separates_delete_markers_and_preserves_unversioned_objects() {
-        let mut marker_meta = FileMeta::new();
-        marker_meta
-            .add_version(FileInfo {
-                volume: "bucket".to_string(),
-                name: "object".to_string(),
-                version_id: Some(Uuid::from_u128(99)),
-                deleted: true,
-                mod_time: Some(OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp")),
-                ..Default::default()
-            })
-            .expect("delete marker should be added");
-        let marker = MetaCacheEntry {
-            name: "object".to_string(),
-            metadata: marker_meta.marshal_msg().expect("delete marker metadata should marshal"),
-            cached: Some(marker_meta),
-            reusable: false,
-        };
-
-        let unversioned_entry = metacache_entry_with_mod_time(
-            OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp"),
-            "unversioned",
-        );
-        let discovery = MetaCacheEntries(vec![Some(marker), Some(unversioned_entry)]).discover_heal_candidates("bucket", 16);
-        assert!(discovery.candidates.iter().any(|candidate| {
-            candidate.kind == MetaCacheHealCandidateKind::DeleteMarker && candidate.version_id == Some(Uuid::from_u128(99))
-        }));
-        assert!(discovery.candidates.iter().any(|candidate| {
-            candidate.kind == MetaCacheHealCandidateKind::UnversionedObject && candidate.version_id.is_none()
-        }));
-    }
-
-    #[test]
-    fn discover_heal_candidates_skips_free_versions() {
-        let object_id = Uuid::from_u128(100);
-        let free_id = Uuid::from_u128(101);
-        let mut meta = FileMeta::new();
-        meta.add_version(FileInfo {
-            volume: "bucket".to_string(),
-            name: "object".to_string(),
-            version_id: Some(object_id),
-            transition_status: TRANSITION_COMPLETE.to_string(),
-            transitioned_objname: "remote/object".to_string(),
-            transition_version_id: Some(Uuid::from_u128(102)),
-            transition_tier: "WARM".to_string(),
-            mod_time: Some(OffsetDateTime::now_utc()),
-            ..Default::default()
-        })
-        .expect("transitioned object should be added");
-        let mut delete = FileInfo {
-            volume: "bucket".to_string(),
-            name: "object".to_string(),
-            version_id: Some(object_id),
-            mod_time: Some(OffsetDateTime::now_utc()),
-            ..Default::default()
-        };
-        delete.set_tier_free_version_id(&free_id.to_string());
-        meta.delete_version(&delete).expect("free version should be persisted");
-
-        let discovery = MetaCacheEntries(vec![Some(MetaCacheEntry {
-            name: "object".to_string(),
-            metadata: meta.marshal_msg().expect("free version metadata should marshal"),
-            cached: Some(meta),
-            reusable: false,
-        })])
-        .discover_heal_candidates("bucket", 16);
-        assert!(discovery.candidates.is_empty());
-    }
-
-    #[test]
-    fn discover_heal_candidates_preserves_unversioned_legacy_object() {
-        let legacy = MetaObjectV1 {
-            version: "1.0.1".to_string(),
-            format: "xl".to_string(),
-            stat: MetaObjectV1Stat {
-                size: 1,
-                mod_time: Some(OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp")),
-                name: "object".to_string(),
-                ..Default::default()
-            },
-            erasure: MetaObjectV1Erasure {
-                data_blocks: 4,
-                parity_blocks: 2,
-                index: 1,
-                distribution: vec![1, 2, 3, 4, 5, 6],
-                ..Default::default()
-            },
-            ..Default::default()
-        };
-        let version = FileMetaVersion {
-            version_type: VersionType::Legacy,
-            legacy_object: Some(legacy),
-            ..Default::default()
-        };
-        let mut meta = FileMeta::new();
-        meta.versions
-            .push(FileMetaShallowVersion::try_from(version).expect("legacy metadata should marshal"));
-        let discovery = MetaCacheEntries(vec![Some(MetaCacheEntry {
-            name: "object".to_string(),
-            metadata: meta.marshal_msg().expect("legacy metadata should marshal"),
-            cached: Some(meta),
-            reusable: false,
-        })])
-        .discover_heal_candidates("bucket", 16);
-        assert!(discovery.candidates.iter().any(|candidate| {
-            candidate.kind == MetaCacheHealCandidateKind::UnversionedObject && candidate.version_id.is_none()
-        }));
-    }
-
-    #[test]
-    fn discover_heal_candidates_rejects_nil_and_malformed_metadata_and_is_bounded() {
-        let now = OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp");
-        let mut nil = metacache_entry_single_version(1, now, "nil");
-        let mut nil_meta = FileMeta::load(&nil.metadata).expect("nil fixture should decode");
-        let mut nil_version = nil_meta.versions[0]
-            .parse_version_meta()
-            .expect("nil fixture version should decode");
-        nil_version.object.as_mut().expect("object fixture").version_id = Some(Uuid::nil());
-        nil_meta.versions[0] = FileMetaShallowVersion::try_from(nil_version).expect("nil fixture should marshal");
-        nil.metadata = nil_meta.marshal_msg().expect("nil fixture metadata should marshal");
-
-        let mut mismatched = metacache_entry_single_version(2, now, "mismatched");
-        let mut mismatched_meta = FileMeta::load(&mismatched.metadata).expect("mismatched fixture should decode");
-        mismatched_meta.versions[0].header.version_id = Some(Uuid::from_u128(200));
-        mismatched.metadata = mismatched_meta.marshal_msg().expect("mismatched metadata should marshal");
-
-        let mut short_parts = metacache_entry_single_version(3, now, "short-parts");
-        let mut short_parts_meta = FileMeta::load(&short_parts.metadata).expect("short-parts fixture should decode");
-        let mut short_parts_version = short_parts_meta.versions[0]
-            .parse_version_meta()
-            .expect("short-parts fixture version should decode");
-        let object = short_parts_version.object.as_mut().expect("object fixture");
-        object.part_numbers = vec![1];
-        object.part_actual_sizes = vec![1];
-        object.part_sizes.clear();
-        short_parts_meta.versions[0] = FileMetaShallowVersion::try_from(short_parts_version).expect("short-parts should marshal");
-        short_parts.metadata = short_parts_meta.marshal_msg().expect("short-parts metadata should marshal");
-
-        let mut short_unversioned = metacache_entry_with_mod_time(now, "short-unversioned");
-        let mut short_unversioned_meta =
-            FileMeta::load(&short_unversioned.metadata).expect("short-unversioned fixture should decode");
-        let mut short_unversioned_version = short_unversioned_meta.versions[0]
-            .parse_version_meta()
-            .expect("short-unversioned version should decode");
-        let unversioned_object = short_unversioned_version.object.as_mut().expect("unversioned object fixture");
-        unversioned_object.part_numbers = vec![1];
-        unversioned_object.part_actual_sizes = vec![1];
-        unversioned_object.part_sizes.clear();
-        short_unversioned_meta.versions[0] =
-            FileMetaShallowVersion::try_from(short_unversioned_version).expect("short-unversioned should marshal");
-        short_unversioned.metadata = short_unversioned_meta
-            .marshal_msg()
-            .expect("short-unversioned metadata should marshal");
-
-        let mut malformed = nil.clone();
-        malformed.name = "malformed".to_string();
-        malformed.metadata = vec![1, 2, 3];
-
-        let entries = MetaCacheEntries(
-            std::iter::once(Some(nil))
-                .chain(std::iter::once(Some(mismatched)))
-                .chain(std::iter::once(Some(short_parts)))
-                .chain(std::iter::once(Some(short_unversioned)))
-                .chain(std::iter::once(Some(malformed)))
-                .chain((0..32).map(|id| Some(metacache_entry_single_version(id + 10, now, "bounded"))))
-                .collect(),
-        );
-        let discovery = entries.discover_heal_candidates("bucket", 5);
-        assert!(discovery.candidates.len() <= 5);
-        assert!(
-            !discovery
-                .candidates
-                .iter()
-                .any(|candidate| candidate.version_id == Some(Uuid::nil()))
-        );
-        assert!(
-            !discovery
-                .candidates
-                .iter()
-                .any(|candidate| candidate.version_id == Some(Uuid::from_u128(2)))
-        );
-        assert!(
-            !discovery
-                .candidates
-                .iter()
-                .any(|candidate| candidate.version_id == Some(Uuid::from_u128(3)))
-        );
-        assert!(discovery.candidates.iter().any(|candidate| {
-            candidate.kind == MetaCacheHealCandidateKind::UnversionedObject && candidate.version_id.is_none()
-        }));
-        assert!(
-            discovery.unverified_count >= 1,
-            "malformed and rejected metadata must remain observable during discovery"
-        );
-
-        for invalid_name in ["../object", "object//", "object\0name"] {
-            let mut entry = metacache_entry_single_version(400, now, invalid_name);
-            entry.name = invalid_name.to_string();
-            let discovery = MetaCacheEntries(vec![Some(entry)]).discover_heal_candidates("bucket", 5);
-            assert!(
-                discovery.candidates.is_empty(),
-                "invalid key should not become a heal candidate: {invalid_name:?}"
-            );
-        }
-    }
-
     #[test]
     fn resolve_rejects_partial_latest_and_returns_committed_previous_metadata() {
         let old_mod_time = OffsetDateTime::from_unix_timestamp(1_705_312_300).expect("valid timestamp");

crates/protos/src/generated/proto_gen/node_service.rs

@@ -722,10 +722,6 @@ pub struct DeleteVersionsResponse {
     pub errors: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
     #[prost(message, optional, tag = "3")]
     pub error: ::core::option::Option<Error>,
-    /// Senders dual-write the legacy strings and typed entries. Receivers prefer typed entries
-    /// when present and fall back to strings for peers that predate this field. Code zero means success.
-    #[prost(message, repeated, tag = "4")]
-    pub item_errors: ::prost::alloc::vec::Vec<Error>,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct ReadMultipleRequest {

crates/protos/src/node.proto

@@ -493,9 +493,6 @@ message DeleteVersionsResponse {
   bool success = 1;
   repeated string errors = 2;
   optional Error error = 3;
-  // Senders dual-write the legacy strings and typed entries. Receivers prefer typed entries
-  // when present and fall back to strings for peers that predate this field. Code zero means success.
-  repeated Error item_errors = 4;
 }
 
 message ReadMultipleRequest {

crates/scanner/src/scanner_folder.rs

@@ -43,7 +43,7 @@ use rustfs_common::metrics::{
     UpdateCurrentPathFn, current_path_updater, global_metrics,
 };
 use rustfs_common::trace_bus::{TraceEvent, TraceFunc, TraceKind, trace_emit, trace_subscriber_count};
-use rustfs_filemeta::{MAX_META_CACHE_HEAL_CANDIDATES, MetaCacheEntries, MetaCacheEntry, MetaCacheHealCandidateKind};
+use rustfs_filemeta::{MetaCacheEntries, MetaCacheEntry, MetadataResolutionParams};
 use rustfs_utils::path::{SLASH_SEPARATOR, path_join_buf};
 use s3s::dto::{BucketLifecycleConfiguration, ObjectLockConfiguration, VersioningConfiguration};
 use time::OffsetDateTime;
@@ -96,10 +96,6 @@ const METRIC_SCANNER_EXCESS_OBJECT_VERSION_SIZE_TOTAL: &str = "rustfs_scanner_ex
 const METRIC_SCANNER_EXCESS_FOLDERS_TOTAL: &str = "rustfs_scanner_excess_folders_total";
 const METRIC_SCANNER_PENDING_HEAL_PRUNE_TOTAL: &str = "rustfs_scanner_pending_heal_prune_total";
 const METRIC_SCANNER_PENDING_HEAL_MALFORMED_TOTAL: &str = "rustfs_scanner_pending_heal_malformed_total";
-const METRIC_SCANNER_HEAL_DISCOVERY_CANDIDATES_TOTAL: &str = "rustfs_scanner_heal_discovery_candidates_total";
-const METRIC_SCANNER_HEAL_DISCOVERY_SUB_QUORUM_TOTAL: &str = "rustfs_scanner_heal_discovery_sub_quorum_total";
-const METRIC_SCANNER_HEAL_DISCOVERY_UNVERIFIED_TOTAL: &str = "rustfs_scanner_heal_discovery_unverified_total";
-const METRIC_SCANNER_HEAL_DISCOVERY_QUEUED_TOTAL: &str = "rustfs_scanner_heal_discovery_queued_total";
 const MAX_PENDING_SCANNER_HEAL_RETRIES_PER_BUCKET: usize = 128;
 
 // --- scanner excess alerts as S3 notification events (rustfs/backlog#1868) --
@@ -887,7 +883,7 @@ impl FolderScanner {
         object: Option<String>,
         version_id: Option<String>,
         request: HealChannelRequest,
-    ) -> Result<HealAdmissionResult, ScannerError> {
+    ) -> Result<(), ScannerError> {
         let candidate_type = pending_scanner_heal_candidate_type(kind);
         let priority = request.priority;
         let scan_mode = request.scan_mode.unwrap_or(self.scan_mode);
@@ -915,7 +911,7 @@ impl FolderScanner {
                     error = %err,
                     "Scanner deferred heal request after channel error"
                 );
-                return Ok(HealAdmissionResult::Full);
+                return Ok(());
             }
         };
         self.update_pending_scanner_heal_after_admission(
@@ -927,7 +923,7 @@ impl FolderScanner {
             result,
         );
         if result.is_admitted() {
-            return Ok(result);
+            return Ok(());
         }
 
         record_high_priority_heal_escalation(candidate_type, priority, result);
@@ -948,7 +944,7 @@ impl FolderScanner {
             state = "high_priority_not_admitted",
             "Scanner high-priority heal admission failed"
         );
-        Ok(result)
+        Ok(())
     }
 
     pub fn set_heal_object_select(&mut self, prob: u32) {
@@ -1740,7 +1736,14 @@ impl FolderScanner {
                 break;
             }
 
-            let mut previous_bucket = String::new();
+            let mut resolver = MetadataResolutionParams {
+                dir_quorum: self.disks_quorum,
+                obj_quorum: self.disks_quorum,
+                bucket: "".to_string(),
+                strict: false,
+                ..Default::default()
+            };
+
             for name in abandoned_children {
                 if !self.should_heal().await {
                     break;
@@ -1748,7 +1751,7 @@ impl FolderScanner {
 
                 let (bucket, prefix) = path2_bucket_object(name.as_str());
 
-                if bucket != previous_bucket {
+                if bucket != resolver.bucket {
                     self.send_required_scanner_heal_request(
                         PendingScannerHealKind::Bucket,
                         bucket.clone(),
@@ -1757,9 +1760,10 @@ impl FolderScanner {
                         build_bucket_heal_request(bucket.clone(), HealChannelPriority::High),
                     )
                     .await?;
-                    previous_bucket = bucket.clone();
                 }
 
+                resolver.bucket = bucket.clone();
+
                 let child_ctx = ctx.child_token();
 
                 let (agreed_tx, mut agreed_rx) = mpsc::channel::<String>(1);
@@ -1876,7 +1880,6 @@ impl FolderScanner {
                 let mut agreed_closed = false;
                 let mut partial_closed = false;
                 let mut finished_closed = false;
-                let mut seen_heal_candidates: HashSet<(String, Option<String>, MetaCacheHealCandidateKind)> = HashSet::new();
 
                 loop {
                     if agreed_closed && partial_closed && finished_closed {
@@ -1901,56 +1904,65 @@ impl FolderScanner {
                                 break;
                             }
 
-                            let discovery = entries.discover_heal_candidates(&bucket, MAX_META_CACHE_HEAL_CANDIDATES);
-                            counter!(METRIC_SCANNER_HEAL_DISCOVERY_CANDIDATES_TOTAL)
-                                .increment(u64::try_from(discovery.candidates.len()).unwrap_or(u64::MAX));
-                            counter!(METRIC_SCANNER_HEAL_DISCOVERY_SUB_QUORUM_TOTAL).increment(
-                                u64::try_from(
-                                    discovery
-                                        .candidates
-                                        .iter()
-                                        .filter(|candidate| candidate.replica_count < disks_quorum)
-                                        .count(),
-                                )
-                                .unwrap_or(u64::MAX),
-                            );
-                            counter!(METRIC_SCANNER_HEAL_DISCOVERY_UNVERIFIED_TOTAL).increment(
-                                u64::try_from(discovery.unverified_count).unwrap_or(u64::MAX),
-                            );
+                            let Some(entry) = resolve_object_heal_entry(&entries, resolver.clone()) else {
+                                continue;
+                            };
 
-                            for candidate in discovery.candidates {
-                                let version_id = candidate.validated_version().map(|id| id.to_string());
-                                let identity = (candidate.object.clone(), version_id.clone(), candidate.kind.clone());
-                                if seen_heal_candidates.len() >= MAX_META_CACHE_HEAL_CANDIDATES
-                                    && !seen_heal_candidates.contains(&identity)
-                                {
+                            (self.update_current_path)(&entry.name).await;
+
+                            if entry.is_dir() {
+                                continue;
+                            }
+
+                            let fivs = match entry.file_info_versions(&bucket) {
+                                Ok(fivs) => fivs,
+                                Err(e) => {
+                                    error!(
+                                        target: "rustfs::scanner::folder",
+                                        event = EVENT_SCANNER_FOLDER_STATE,
+                                        component = LOG_COMPONENT_SCANNER,
+                                        subsystem = LOG_SUBSYSTEM_FOLDER,
+                                        bucket = %bucket,
+                                        entry = %entry.name,
+                                        state = "file_info_versions_failed",
+                                        error = %e,
+                                        "Scanner list_path_raw failed to resolve file versions"
+                                    );
+                                    self.send_required_scanner_heal_request(
+                                        PendingScannerHealKind::Object,
+                                        bucket.clone(),
+                                        Some(entry.name.clone()),
+                                        None,
+                                        build_object_heal_request(
+                                            bucket.clone(),
+                                            entry.name.clone(),
+                                            None,
+                                            self.scan_mode,
+                                            HealChannelPriority::High,
+                                        ),
+                                    )
+                                    .await?;
+                                    found_objects = true;
                                     continue;
                                 }
-                                if !seen_heal_candidates.insert(identity) {
-                                    continue;
-                                }
-                                let mut request = build_object_heal_request(
-                                    bucket.clone(),
-                                    candidate.object.clone(),
-                                    version_id.clone(),
-                                    self.scan_mode,
-                                    HealChannelPriority::High,
-                                );
-                                if candidate.is_unversioned() {
-                                    request.remove_corrupted = Some(false);
-                                }
-                                (self.update_current_path)(&candidate.object).await;
-                                let admission = self.send_required_scanner_heal_request(
+                            };
+
+                            for fiv in fivs.versions {
+                                let version_id = fiv.version_id.and_then(|v| if v.is_nil() { None } else { Some(v.to_string()) });
+                                self.send_required_scanner_heal_request(
                                     PendingScannerHealKind::Object,
                                     bucket.clone(),
-                                    Some(candidate.object.clone()),
-                                    version_id,
-                                    request,
+                                    Some(entry.name.clone()),
+                                    version_id.clone(),
+                                    build_object_heal_request(
+                                        bucket.clone(),
+                                        entry.name.clone(),
+                                        version_id,
+                                        self.scan_mode,
+                                        HealChannelPriority::High,
+                                    ),
                                 )
                                 .await?;
-                                if admission.is_admitted() {
-                                    counter!(METRIC_SCANNER_HEAL_DISCOVERY_QUEUED_TOTAL).increment(1);
-                                }
                                 found_objects = true;
                             }
 

crates/scanner/src/scanner_folder/item_actions.rs

@@ -13,8 +13,6 @@
 // limitations under the License.
 /// Per-object scan actions: ScannerItem, the get-size failure policy, and the heal/ILM admission helpers.
 use super::*;
-#[cfg(test)]
-use rustfs_filemeta::MetadataResolutionParams;
 
 /// Cached folder information for scanning
 #[derive(Clone, Debug)]
@@ -90,7 +88,6 @@ pub(super) fn build_object_heal_request(
     }
 }
 
-#[cfg(test)]
 pub(super) fn resolve_object_heal_entry(
     entries: &MetaCacheEntries,
     resolver: MetadataResolutionParams,

crates/scanner/src/scanner_folder/ledger.rs

@@ -305,17 +305,13 @@ pub(super) fn build_pending_scanner_heal_request(entry: &PendingScannerHeal) ->
     match entry.kind {
         PendingScannerHealKind::Bucket => Some(build_bucket_heal_request(entry.bucket.clone(), HealChannelPriority::High)),
         PendingScannerHealKind::Object => entry.object.as_ref().map(|object| {
-            let mut request = build_object_heal_request(
+            build_object_heal_request(
                 entry.bucket.clone(),
                 object.clone(),
                 entry.version_id.clone(),
                 entry.scan_mode,
                 HealChannelPriority::High,
-            );
-            if entry.version_id.is_none() {
-                request.remove_corrupted = Some(false);
-            }
-            request
+            )
         }),
     }
 }

crates/scanner/src/scanner_folder/tests.rs

@@ -17,7 +17,7 @@ use crate::SCANNER_SLEEPER;
 use super::*;
 use crate::storage_api::VersionPurgeStatusType;
 use crate::{DiskOption, Endpoint, STORAGE_FORMAT_FILE, TierStats, new_disk, storageclass};
-use rustfs_filemeta::{FileInfo, FileMeta, MetadataResolutionParams};
+use rustfs_filemeta::{FileInfo, FileMeta};
 use std::io::Write;
 #[cfg(unix)]
 use std::os::unix::fs::{PermissionsExt, symlink};
@@ -1121,17 +1121,6 @@ fn test_pending_heal_reconstructs_object_request_with_version() {
     assert_eq!(request.source, HealRequestSource::Scanner);
 }
 
-#[test]
-fn test_pending_heal_reconstructs_unversioned_request_without_removal() {
-    let pending = pending_heal(PendingScannerHealKind::Object, "bucket", Some("object"), None, 1, 1);
-
-    let request = build_pending_scanner_heal_request(&pending).expect("unversioned object request should rebuild");
-
-    assert!(request.object_version_id.is_none());
-    assert_eq!(request.remove_corrupted, Some(false));
-    assert_eq!(request.recreate_missing, Some(false));
-}
-
 #[test]
 fn test_pending_heal_retry_candidates_respect_cap_and_order() {
     let pending: Vec<PendingScannerHeal> = (0..(MAX_PENDING_SCANNER_HEAL_RETRIES_PER_BUCKET + 2))
@@ -1334,20 +1323,6 @@ fn metadata_for_object(bucket: &str, object: &str) -> Vec<u8> {
     meta.marshal_msg().expect("test metadata should marshal")
 }
 
-fn metadata_for_object_version(bucket: &str, object: &str, version_id: Option<Uuid>) -> Vec<u8> {
-    let mut file_info = FileInfo::new(object, 4, 2);
-    file_info.volume = bucket.to_string();
-    file_info.name = object.to_string();
-    file_info.version_id = version_id;
-    file_info.versioned = version_id.is_some();
-    file_info.mod_time = Some(OffsetDateTime::now_utc());
-    file_info.size = 1;
-
-    let mut meta = FileMeta::new();
-    meta.add_version(file_info).expect("test metadata version should be accepted");
-    meta.marshal_msg().expect("test metadata should marshal")
-}
-
 async fn write_test_object_metadata(root: &std::path::Path, bucket: &str, object: &str) {
     write_test_object_metadata_bytes(root, bucket, object, &metadata_for_object(bucket, object)).await;
 }
@@ -1751,21 +1726,12 @@ async fn test_scan_folder_exits_when_abandoned_child_listing_finishes() {
     let _guard = TestGuard::new(60, 100, &mut scanner, temp_dir.clone());
     let heal_starts = Arc::new(AtomicUsize::new(0));
     let heal_starts_clone = heal_starts.clone();
-    let healed_versions = Arc::new(Mutex::new(Vec::<Option<String>>::new()));
-    let healed_versions_clone = healed_versions.clone();
     let mut heal_rx =
         rustfs_common::heal_channel::init_heal_channel().expect("heal channel should initialize once for scanner tests");
     let _heal_responder = tokio::spawn(async move {
         while let Some(command) = heal_rx.recv().await {
-            if let rustfs_common::heal_channel::HealChannelCommand::Start {
-                request, response_tx, ..
-            } = command
-            {
+            if let rustfs_common::heal_channel::HealChannelCommand::Start { response_tx, .. } = command {
                 heal_starts_clone.fetch_add(1, Ordering::Relaxed);
-                healed_versions_clone
-                    .lock()
-                    .expect("heal version capture lock should not be poisoned")
-                    .push(request.object_version_id);
                 let _ = response_tx.send(Ok(HealAdmissionResult::Accepted));
             }
         }
@@ -1773,18 +1739,13 @@ async fn test_scan_folder_exits_when_abandoned_child_listing_finishes() {
 
     let bucket = "src-archive";
     let object = "snapshots/37b3f20d941e2f5e6d99114d9bb2f3e67a8a2e5c9c4c5a1b0d6e7f8091a2b3c4";
-    let orphan_version = Uuid::from_u128(0x1934);
-    let shared_version = Uuid::from_u128(0x1935);
-    let orphan_metadata = metadata_for_object_version(bucket, object, Some(orphan_version));
-    let shared_metadata = metadata_for_object_version(bucket, object, Some(shared_version));
-    write_test_object_metadata_bytes(&temp_dir, bucket, object, &orphan_metadata).await;
-    let mut expected_metadata = vec![(temp_dir.join(bucket).join(object).join("xl.meta"), orphan_metadata.clone())];
+    let metadata = metadata_for_object(bucket, object);
+    write_test_object_metadata_bytes(&temp_dir, bucket, object, &metadata).await;
 
     let mut disks = vec![scanner.local_disk.clone()];
     for disk_name in ["disk2", "disk3", "disk4"] {
         let disk_root = temp_dir.join(disk_name);
-        write_test_object_metadata_bytes(&disk_root, bucket, object, &shared_metadata).await;
-        expected_metadata.push((disk_root.join(bucket).join(object).join("xl.meta"), shared_metadata.clone()));
+        write_test_object_metadata_bytes(&disk_root, bucket, object, &metadata).await;
         let endpoint = Endpoint::try_from(disk_root.to_string_lossy().as_ref()).expect("failed to create extra disk endpoint");
         let disk = new_disk(
             &endpoint,
@@ -1833,29 +1794,8 @@ async fn test_scan_folder_exits_when_abandoned_child_listing_finishes() {
         .new_cache
         .checked_flatten(bucket)
         .expect("healed cache must contain canonical child links");
-    // The fixture intentionally exposes two divergent version histories, so
-    // the scanner keeps both logical versions visible while discovering heals.
-    assert_eq!(root.objects, 2);
+    assert_eq!(root.objects, 1);
     assert!(heal_starts.load(Ordering::Relaxed) > 0, "test must execute the heal child-link path");
-    let orphan_version_text = orphan_version.to_string();
-    assert!(
-        healed_versions
-            .lock()
-            .expect("heal version capture lock should not be poisoned")
-            .iter()
-            .any(|version| version.as_deref() == Some(orphan_version_text.as_str())),
-        "sub-quorum orphan version must be submitted as an exact heal candidate"
-    );
-    for (path, expected) in expected_metadata {
-        assert_eq!(
-            tokio::fs::read(&path)
-                .await
-                .expect("scanner discovery must not delete metadata"),
-            expected,
-            "scanner discovery must not modify candidate metadata: {}",
-            path.display()
-        );
-    }
 }
 
 #[tokio::test]

rustfs/src/storage/rpc/node_service/disk.rs

@@ -146,29 +146,6 @@ fn encode_file_info_msgpack(value: &FileInfo) -> std::result::Result<Vec<u8>, Di
     encode_msgpack_with_capacity(value, "FileInfo", FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT)
 }
 
-fn encode_delete_versions_errors(disk_errors: Vec<Option<DiskError>>) -> (Vec<String>, Vec<Error>) {
-    let mut errors = Vec::with_capacity(disk_errors.len());
-    let mut item_errors = Vec::with_capacity(disk_errors.len());
-    for error in disk_errors {
-        match error {
-            Some(error) => {
-                let code = match &error {
-                    DiskError::Io(source) if source.kind() == std::io::ErrorKind::NotFound => DiskError::FileNotFound.to_u32(),
-                    _ => error.to_u32(),
-                };
-                let error_info = error.to_string();
-                errors.push(error_info.clone());
-                item_errors.push(Error { code, error_info });
-            }
-            None => {
-                errors.push(String::new());
-                item_errors.push(Error::default());
-            }
-        }
-    }
-    (errors, item_errors)
-}
-
 fn encode_msgpack_named<T: serde::Serialize>(value: &T, value_name: &str) -> std::result::Result<Vec<u8>, DiskError> {
     let mut serializer = rmp_serde::Serializer::new(Vec::with_capacity(MSGPACK_ENCODE_CAPACITY_HINT)).with_struct_map();
     value
@@ -575,7 +552,6 @@ impl NodeService {
                             success: false,
                             errors: Vec::new(),
                             error: Some(DiskError::other(format!("decode FileInfoVersions failed: {err}")).into()),
-                            item_errors: Vec::new(),
                         }));
                     }
                 };
@@ -587,26 +563,30 @@ impl NodeService {
                         success: false,
                         errors: Vec::new(),
                         error: Some(DiskError::other(format!("decode DeleteOptions failed: {err}")).into()),
-                        item_errors: Vec::new(),
                     }));
                 }
             };
 
-            let (errors, item_errors) =
-                encode_delete_versions_errors(disk.delete_versions(&request.volume, versions, opts).await);
+            let errors = disk
+                .delete_versions(&request.volume, versions, opts)
+                .await
+                .into_iter()
+                .map(|error| match error {
+                    Some(e) => e.to_string(),
+                    None => "".to_string(),
+                })
+                .collect();
 
             Ok(Response::new(DeleteVersionsResponse {
                 success: true,
                 errors,
                 error: None,
-                item_errors,
             }))
         } else {
             Ok(Response::new(DeleteVersionsResponse {
                 success: false,
                 errors: Vec::new(),
                 error: Some(DiskError::other("cannot find disk".to_string()).into()),
-                item_errors: Vec::new(),
             }))
         }
     }
@@ -1632,8 +1612,8 @@ impl NodeService {
 mod tests {
     use super::{
         compat_response_json, decode_msgpack_or_json, decode_rename_data_request_file_info,
-        encode_batch_read_version_response_payloads, encode_delete_versions_errors, encode_file_info_msgpack, encode_msgpack,
-        encode_msgpack_named, encode_read_multiple_response_payloads, encode_rename_data_response_payloads,
+        encode_batch_read_version_response_payloads, encode_file_info_msgpack, encode_msgpack, encode_msgpack_named,
+        encode_read_multiple_response_payloads, encode_rename_data_response_payloads,
     };
     use crate::storage::rpc::node_service::make_server;
     use crate::storage::storage_api::ReadMultipleResp;
@@ -1652,18 +1632,6 @@ mod tests {
         count: u32,
     }
 
-    #[test]
-    fn delete_versions_response_dual_writes_typed_item_errors() {
-        let raw_not_found = super::DiskError::Io(std::io::Error::from(std::io::ErrorKind::NotFound));
-        let (errors, item_errors) = encode_delete_versions_errors(vec![Some(raw_not_found), None]);
-
-        assert!(errors[0].starts_with("io error "));
-        assert!(errors[1].is_empty());
-        assert_eq!(item_errors[0].code, super::DiskError::FileNotFound.to_u32());
-        assert_eq!(item_errors[0].error_info, errors[0]);
-        assert_eq!(item_errors[1].code, 0);
-    }
-
     #[tokio::test]
     #[serial]
     async fn handle_read_version_records_attribution_for_missing_disk() {