fix(ecstore): type decommission completion result

crates/ecstore/src/api/mod.rs

@@ -241,8 +241,8 @@ pub mod cache {
 
 pub mod capacity {
     pub use crate::core::pools::{
-        PoolDecommissionInfo, PoolStatus, get_total_usable_capacity, get_total_usable_capacity_free, path2_bucket_object,
-        path2_bucket_object_with_base_path,
+        DecommissionUnresolvedEntry, PoolDecommissionInfo, PoolStatus, get_total_usable_capacity, get_total_usable_capacity_free,
+        path2_bucket_object, path2_bucket_object_with_base_path,
     };
     pub use crate::store::utils::is_reserved_or_invalid_bucket;
 }

crates/ecstore/src/core/pools.rs

@@ -804,6 +804,88 @@ fn ensure_decommission_generation(meta: &PoolMeta, idx: usize, generation: Offse
     }
 }
 
+fn record_decommission_unresolved_entry(
+    meta: &mut PoolMeta,
+    idx: usize,
+    generation: OffsetDateTime,
+    entry: DecommissionUnresolvedEntry,
+) -> Result<bool> {
+    ensure_decommission_generation(meta, idx, generation)?;
+    if entry.pool_index != idx || entry.source_generation != generation {
+        return Err(Error::other("decommission unresolved entry does not match the active pool generation"));
+    }
+
+    let pool_count = meta.pools.len();
+    let Some(pool) = meta.pools.get_mut(idx) else {
+        return Err(invalid_decommission_pool_index_error(pool_count, idx));
+    };
+    let Some(info) = pool.decommission.as_mut() else {
+        return Err(decommission_metadata_not_initialized_error("record decommission unresolved entry"));
+    };
+    let existing = info.unresolved_entries.iter_mut().find(|existing| {
+        existing.bucket == entry.bucket
+            && existing.object == entry.object
+            && existing.pool_index == entry.pool_index
+            && existing.set_index == entry.set_index
+            && existing.source_generation == entry.source_generation
+    });
+    let changed = match existing {
+        Some(existing) if existing == &entry => false,
+        Some(existing) => {
+            *existing = entry;
+            true
+        }
+        None => {
+            info.unresolved_entries.push(entry);
+            true
+        }
+    };
+    if changed {
+        pool.last_update = OffsetDateTime::now_utc();
+    }
+    Ok(changed)
+}
+
+fn reconcile_decommission_unresolved_entries_for_completion(
+    meta: &mut PoolMeta,
+    idx: usize,
+    verified_generation: Option<OffsetDateTime>,
+) -> Result<()> {
+    let pool_count = meta.pools.len();
+    let Some(pool) = meta.pools.get(idx) else {
+        return Err(invalid_decommission_pool_index_error(pool_count, idx));
+    };
+    let Some(info) = pool.decommission.as_ref() else {
+        return Err(decommission_metadata_not_initialized_error("reconcile decommission unresolved entries"));
+    };
+    if info.unresolved_entries.is_empty() {
+        return Ok(());
+    }
+
+    let Some(generation) = verified_generation else {
+        return Err(Error::other(format!(
+            "failed to complete decommission for pool {idx}: {} unresolved listing entries remain",
+            info.unresolved_entries.len()
+        )));
+    };
+    ensure_decommission_generation(meta, idx, generation)?;
+    if info
+        .unresolved_entries
+        .iter()
+        .any(|entry| entry.source_generation != generation)
+    {
+        return Err(Error::other(format!(
+            "failed to complete decommission for pool {idx}: unresolved listing ledger contains a different generation"
+        )));
+    }
+
+    let Some(info) = meta.pools.get_mut(idx).and_then(|pool| pool.decommission.as_mut()) else {
+        return Err(decommission_metadata_not_initialized_error("reconcile decommission unresolved entries"));
+    };
+    info.unresolved_entries.clear();
+    Ok(())
+}
+
 async fn run_decommission_side_effect<T, F, Fut>(
     rx: &CancellationToken,
     operation_gate: &Arc<tokio::sync::RwLock<()>>,
@@ -981,18 +1063,15 @@ fn resolve_decommission_listing_error(listing_error: Option<Error>, entry_error:
     }
 }
 
-fn decommission_unresolved_listing_error(
-    bucket: &str,
-    prefix: &str,
-    candidate: Option<&str>,
-    candidate_count: usize,
-    disk_error_count: usize,
-    pool_index: usize,
-    set_index: usize,
-) -> Error {
-    let location = candidate.unwrap_or(prefix);
+fn decommission_unresolved_listing_error(entry: &DecommissionUnresolvedEntry) -> Error {
     Error::other(format!(
-        "decommission listing could not resolve metadata for {bucket}/{location} on pool {pool_index} set {set_index} ({candidate_count} candidate(s), {disk_error_count} disk error(s))"
+        "decommission listing could not resolve metadata for {bucket}/{object} on pool {pool_index} set {set_index} ({candidate_count} candidate(s), {disk_error_count} disk error(s))",
+        bucket = entry.bucket,
+        object = entry.object,
+        pool_index = entry.pool_index,
+        set_index = entry.set_index,
+        candidate_count = entry.candidate_count,
+        disk_error_count = entry.disk_error_count,
     ))
 }
 
@@ -1004,22 +1083,32 @@ fn resolve_decommission_partial_listing_entry(
     disk_error_count: usize,
     pool_index: usize,
     set_index: usize,
-) -> Result<MetaCacheEntry> {
+    source_generation: OffsetDateTime,
+) -> std::result::Result<MetaCacheEntry, DecommissionUnresolvedEntry> {
     let candidate_count = entries.as_ref().iter().flatten().count();
     if let Some(entry) = entries.resolve(resolver) {
         return Ok(entry);
     }
 
-    let candidate = entries.as_ref().iter().flatten().map(|entry| entry.name.as_str()).next();
-    Err(decommission_unresolved_listing_error(
-        bucket,
-        prefix,
-        candidate,
+    let object = entries
+        .as_ref()
+        .iter()
+        .flatten()
+        .map(|entry| entry.name.as_str())
+        .next()
+        .unwrap_or(prefix)
+        .to_string();
+    Err(DecommissionUnresolvedEntry {
+        bucket: bucket.to_string(),
+        object,
         candidate_count,
         disk_error_count,
         pool_index,
         set_index,
-    ))
+        source_generation,
+        observed_at: OffsetDateTime::now_utc(),
+        reason: "metadata_resolution_failed".to_string(),
+    })
 }
 
 fn resolve_decommission_pool_meta_reload_result(result: Result<()>, stage: &str) -> Result<()> {
@@ -1624,6 +1713,8 @@ struct PersistedPoolDecommissionInfo {
     pub terminal_reload_attempt_at: Option<OffsetDateTime>,
     #[serde(rename = "terminalReloadFailures", default)]
     pub terminal_reload_failures: Vec<String>,
+    #[serde(rename = "unresolvedEntries", default)]
+    pub unresolved_entries: Vec<DecommissionUnresolvedEntry>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -1755,6 +1846,7 @@ impl TryFrom<PersistedPoolDecommissionInfo> for PoolDecommissionInfo {
             bytes_failed: value.bytes_failed,
             terminal_reload_attempt_at: value.terminal_reload_attempt_at,
             terminal_reload_failures: value.terminal_reload_failures,
+            unresolved_entries: value.unresolved_entries,
             progress_save_item_baseline: value.items_decommissioned.saturating_add(value.items_decommission_failed),
             progress_save_retry_after: None,
         })
@@ -1787,6 +1879,7 @@ impl TryFrom<LegacyPoolDecommissionInfo> for PoolDecommissionInfo {
             bytes_failed: value.bytes_failed,
             terminal_reload_attempt_at: None,
             terminal_reload_failures: Vec::new(),
+            unresolved_entries: Vec::new(),
             progress_save_item_baseline: value.items_decommissioned.saturating_add(value.items_decommission_failed),
             progress_save_retry_after: None,
         })
@@ -1835,6 +1928,7 @@ impl From<&PoolDecommissionInfo> for PersistedPoolDecommissionInfo {
             bytes_failed: value.bytes_failed,
             terminal_reload_attempt_at: value.terminal_reload_attempt_at,
             terminal_reload_failures: value.terminal_reload_failures.clone(),
+            unresolved_entries: value.unresolved_entries.clone(),
         }
     }
 }
@@ -2435,6 +2529,26 @@ pub fn path2_bucket_object_with_base_path(base_path: &str, path: &str) -> (Strin
     path_to_bucket_object_with_base_path(base_path, path)
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct DecommissionUnresolvedEntry {
+    pub bucket: String,
+    pub object: String,
+    #[serde(rename = "poolIndex")]
+    pub pool_index: usize,
+    #[serde(rename = "setIndex")]
+    pub set_index: usize,
+    #[serde(rename = "sourceGeneration", with = "time::serde::rfc3339")]
+    pub source_generation: OffsetDateTime,
+    #[serde(rename = "candidateCount")]
+    pub candidate_count: usize,
+    #[serde(rename = "diskErrorCount")]
+    pub disk_error_count: usize,
+    #[serde(rename = "observedAt", with = "time::serde::rfc3339")]
+    pub observed_at: OffsetDateTime,
+    pub reason: String,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct PoolDecommissionInfo {
     #[serde(rename = "startTime", with = "time::serde::rfc3339::option")]
@@ -2480,6 +2594,8 @@ pub struct PoolDecommissionInfo {
     #[serde(rename = "terminalReloadFailures", default)]
     pub terminal_reload_failures: Vec<String>,
     #[serde(skip)]
+    pub unresolved_entries: Vec<DecommissionUnresolvedEntry>,
+    #[serde(skip)]
     pub progress_save_item_baseline: usize,
     #[serde(skip)]
     pub progress_save_retry_after: Option<OffsetDateTime>,
@@ -2513,6 +2629,7 @@ impl PoolDecommissionInfo {
             || self.bytes_failed > 0
             || self.terminal_reload_attempt_at.is_some()
             || !self.terminal_reload_failures.is_empty()
+            || !self.unresolved_entries.is_empty()
     }
 
     fn counted_items(&self) -> usize {
@@ -2830,6 +2947,21 @@ impl ECStore {
         snapshot.save(self.pools.clone()).await
     }
 
+    async fn persist_decommission_unresolved_entry(
+        &self,
+        idx: usize,
+        generation: OffsetDateTime,
+        entry: DecommissionUnresolvedEntry,
+    ) -> Result<()> {
+        {
+            let mut pool_meta = self.pool_meta.write().await;
+            record_decommission_unresolved_entry(&mut pool_meta, idx, generation, entry)?;
+        }
+        self.save_current_pool_meta()
+            .await
+            .map_err(|err| Error::other(format!("decommission unresolved entry ledger save failed: {err}")))
+    }
+
     async fn save_decommission_progress_checkpoint(&self, idx: usize, generation: OffsetDateTime) -> Result<bool> {
         // Lock order: save gate, then the short pool metadata read/write sections. Peer
         // reloads are intentionally performed by the caller after both locks are released.
@@ -3678,6 +3810,7 @@ impl ECStore {
         let list_bi = bi.clone();
         let list_outstanding = outstanding.clone();
         let list_entry_error = entry_error.clone();
+        let list_store = self.clone();
         let mut listing = tokio::spawn(async move {
             run_decommission_listing_with_retry_and_drain(
                 list_rx.clone(),
@@ -3691,8 +3824,9 @@ impl ECStore {
                     let rx = list_rx_for_list.clone();
                     let bucket = list_bi.clone();
                     let entry_error = list_entry_error.clone();
+                    let store = list_store.clone();
                     async move {
-                        set.list_objects_to_decommission(rx, bucket, callback, entry_error, idx, set_idx)
+                        set.list_objects_to_decommission(store, rx, bucket, callback, entry_error, idx, set_idx, generation)
                             .await
                     }
                 },
@@ -4593,7 +4727,7 @@ impl ECStore {
                     state = "verifying_completion",
                     "Decommission completion verification started"
                 );
-                if let Err(err) = self.check_after_decommission(idx).await {
+                if let Err(err) = self.check_after_decommission(idx, generation).await {
                     resolve_decommission_terminal_mark_result(
                         self.decommission_failed_for_operation(idx, canceler).await,
                         "failed",
@@ -4620,7 +4754,7 @@ impl ECStore {
                     "Decommission marking completed state"
                 );
                 resolve_decommission_terminal_mark_result(
-                    self.complete_decommission_for_operation(idx, canceler).await,
+                    self.complete_decommission_for_operation(idx, canceler, generation).await,
                     "completed",
                     &cmd_line,
                 )?;
@@ -4756,14 +4890,25 @@ impl ECStore {
 
     #[tracing::instrument(skip(self))]
     pub async fn complete_decommission(&self, idx: usize) -> Result<()> {
-        self.complete_decommission_with_owner(idx, None).await
+        self.complete_decommission_with_owner(idx, None, None).await
     }
 
-    async fn complete_decommission_for_operation(&self, idx: usize, owner: &DecommissionCanceler) -> Result<()> {
-        self.complete_decommission_with_owner(idx, Some(owner)).await
+    async fn complete_decommission_for_operation(
+        &self,
+        idx: usize,
+        owner: &DecommissionCanceler,
+        verified_generation: OffsetDateTime,
+    ) -> Result<()> {
+        self.complete_decommission_with_owner(idx, Some(owner), Some(verified_generation))
+            .await
     }
 
-    async fn complete_decommission_with_owner(&self, idx: usize, owner: Option<&DecommissionCanceler>) -> Result<()> {
+    async fn complete_decommission_with_owner(
+        &self,
+        idx: usize,
+        owner: Option<&DecommissionCanceler>,
+        verified_generation: Option<OffsetDateTime>,
+    ) -> Result<()> {
         ensure_decommission_terminal_operation_supported(self.single_pool(), "complete decommission")?;
         let _start_guard = self.start_gate.lock().await;
 
@@ -4775,11 +4920,13 @@ impl ECStore {
             let previous_pool_meta = pool_meta.clone();
             let Some(changed) =
                 update_decommission_for_operation(cancelers.as_slice(), &mut pool_meta, idx, owner, |pool_meta| {
-                    pool_meta.decommission_complete(idx)
+                    reconcile_decommission_unresolved_entries_for_completion(pool_meta, idx, verified_generation)?;
+                    Ok::<bool, Error>(pool_meta.decommission_complete(idx))
                 })
             else {
                 return Ok(());
             };
+            let changed = changed?;
             let terminal_canceler = if let Some(owner) = owner {
                 Some(owner.clone())
             } else {
@@ -5139,7 +5286,7 @@ impl ECStore {
         Ok(ret)
     }
 
-    async fn check_after_decommission(self: &Arc<Self>, idx: usize) -> Result<()> {
+    async fn check_after_decommission(self: &Arc<Self>, idx: usize, generation: OffsetDateTime) -> Result<()> {
         let buckets = self.get_buckets_to_decommission().await?;
         let pool = self.pools[idx].clone();
 
@@ -5238,7 +5385,16 @@ impl ECStore {
                 });
 
                 let list_result = set
-                    .list_objects_to_decommission(callback_rx, bucket_info.clone(), callback, entry_error.clone(), idx, set_index)
+                    .list_objects_to_decommission(
+                        self.clone(),
+                        callback_rx,
+                        bucket_info.clone(),
+                        callback,
+                        entry_error.clone(),
+                        idx,
+                        set_index,
+                        generation,
+                    )
                     .await;
                 let entry_error = entry_error.lock().await.clone();
                 resolve_decommission_check_after_list_result(list_result, entry_error)?;
@@ -5607,6 +5763,17 @@ mod tests {
     #[test]
     fn pool_meta_persists_decommission_resume_queues() {
         let start_time = OffsetDateTime::now_utc();
+        let unresolved_entry = DecommissionUnresolvedEntry {
+            bucket: "bucket-b".to_string(),
+            object: "prefix/unresolved.txt".to_string(),
+            pool_index: 0,
+            set_index: 1,
+            source_generation: start_time,
+            candidate_count: 2,
+            disk_error_count: 1,
+            observed_at: start_time,
+            reason: "metadata_resolution_failed".to_string(),
+        };
         let pool_meta = PoolMeta {
             version: POOL_META_VERSION,
             pools: vec![PoolStatus {
@@ -5627,6 +5794,7 @@ mod tests {
                     bytes_failed: 128,
                     terminal_reload_attempt_at: Some(start_time),
                     terminal_reload_failures: vec!["complete_decommission: peer node-a failed".to_string()],
+                    unresolved_entries: vec![unresolved_entry.clone()],
                     ..Default::default()
                 }),
             }],
@@ -5666,6 +5834,7 @@ mod tests {
             restored_decommission.terminal_reload_failures,
             vec!["complete_decommission: peer node-a failed".to_string()]
         );
+        assert_eq!(restored_decommission.unresolved_entries, vec![unresolved_entry]);
         assert!(restored_decommission.queued);
         assert_eq!(restored_decommission.items_since_last_progress_save(), 0);
     }
@@ -5757,6 +5926,7 @@ mod tests {
         assert!(decommission.bucket.is_empty());
         assert!(decommission.prefix.is_empty());
         assert!(decommission.object.is_empty());
+        assert!(decommission.unresolved_entries.is_empty());
     }
 
     #[test]
@@ -6046,28 +6216,32 @@ async fn record_decommission_entry_error(
     entry_error: &Arc<tokio::sync::Mutex<Option<Error>>>,
     rx: &CancellationToken,
     err: Error,
-) {
+) -> bool {
     if rx.is_cancelled() {
-        return;
+        return false;
     }
 
     let mut first_err = entry_error.lock().await;
     if first_err.is_none() && !rx.is_cancelled() {
         *first_err = Some(err);
         rx.cancel();
+        return true;
     }
+    false
 }
 
 impl SetDisks {
-    #[tracing::instrument(skip(self, rx, cb_func, entry_error))]
+    #[tracing::instrument(skip(self, store, rx, cb_func, entry_error))]
     async fn list_objects_to_decommission(
         self: &Arc<Self>,
+        store: Arc<ECStore>,
         rx: CancellationToken,
         bucket_info: DecomBucketInfo,
         cb_func: ListCallback,
         entry_error: Arc<tokio::sync::Mutex<Option<Error>>>,
         pool_index: usize,
         set_index: usize,
+        source_generation: OffsetDateTime,
     ) -> Result<()> {
         let (disks, _) = self.get_online_disks_with_healing(false).await;
         ensure_decommission_listing_disks_available(!disks.is_empty(), &bucket_info.name)?;
@@ -6088,6 +6262,8 @@ impl SetDisks {
         let unresolved_prefix = bucket_info.prefix.clone();
         let unresolved_pool_index = pool_index;
         let unresolved_set_index = set_index;
+        let unresolved_generation = source_generation;
+        let unresolved_store = store;
 
         list_path_raw(
             rx,
@@ -6107,8 +6283,10 @@ impl SetDisks {
                     let prefix = unresolved_prefix.clone();
                     let unresolved_error = unresolved_error.clone();
                     let unresolved_rx = unresolved_rx.clone();
+                    let unresolved_store = unresolved_store.clone();
                     let pool_index = unresolved_pool_index;
                     let set_index = unresolved_set_index;
+                    let source_generation = unresolved_generation;
                     let disk_error_count = errs.iter().flatten().count();
                     if unresolved_rx.is_cancelled() {
                         return Box::pin(async {});
@@ -6122,6 +6300,7 @@ impl SetDisks {
                         disk_error_count,
                         pool_index,
                         set_index,
+                        source_generation,
                     ) {
                         Ok(entry) => {
                             warn!("decommission_pool: list_objects_to_decommission get {}", &entry.name);
@@ -6129,10 +6308,11 @@ impl SetDisks {
                                 cb_func(entry).await;
                             })
                         }
-                        Err(err) => Box::pin(async move {
+                        Err(unresolved_entry) => Box::pin(async move {
                             if unresolved_rx.is_cancelled() {
                                 return;
                             }
+                            let err = decommission_unresolved_listing_error(&unresolved_entry);
                             warn!(
                                 event = EVENT_DECOMMISSION_BUCKET,
                                 component = LOG_COMPONENT_ECSTORE,
@@ -6143,6 +6323,13 @@ impl SetDisks {
                                 error = %err,
                                 "Decommission listing failed closed on unresolved metadata"
                             );
+                            let err = match unresolved_store
+                                .persist_decommission_unresolved_entry(pool_index, source_generation, unresolved_entry)
+                                .await
+                            {
+                                Ok(()) => err,
+                                Err(ledger_err) => Error::other(format!("{err}; {ledger_err}")),
+                            };
                             record_decommission_entry_error(&unresolved_error, &unresolved_rx, err).await;
                         }),
                     }
@@ -6351,47 +6538,52 @@ mod pools_tests {
     use super::{
         DECOMMISSION_ENTRY_CONCURRENCY_DEFAULT_CAP, DECOMMISSION_ENTRY_CONCURRENCY_HARD_CAP, DECOMMISSION_ENTRY_QUEUE_HARD_CAP,
         DECOMMISSION_PROGRESS_SAVE_INTERVAL, DECOMMISSION_PROGRESS_SAVE_ITEM_THRESHOLD, DecomBucketInfo, DecommissionCanceler,
-        DecommissionEntryEnqueueResult, DecommissionStartPoolState, DecommissionTerminalState, ListCallback,
-        PoolDecommissionInfo, PoolMeta, PoolSpaceInfo, PoolStatus, QueuedDecommissionEntry, apply_decommission_status_space_info,
-        await_decommission_worker, bind_decommission_cancelers, bind_missing_decommission_cancelers,
-        cancel_decommission_canceler, clamp_decommission_entry_concurrency, classify_decommission_terminal_state,
-        count_decommission_item, decommission_cancel_signal_result, decommission_entry_queue_capacity, decommission_item_size,
-        decommission_meta_bucket_options, decommission_start_pool_state, dedup_indices, default_decommission_bucket_concurrency,
-        default_decommission_entry_concurrency, drain_decommission_entry_queue, enqueue_decommission_entry,
-        ensure_decommission_cancel_allowed, ensure_decommission_clear_allowed, ensure_decommission_generation,
-        ensure_decommission_listing_disks_available, ensure_decommission_not_rebalancing, ensure_decommission_start_allowed,
-        ensure_decommission_start_keeps_active_pool, ensure_decommission_start_local_leader,
+        DecommissionEntryEnqueueResult, DecommissionStartPoolState, DecommissionTerminalState, DecommissionUnresolvedEntry,
+        ListCallback, POOL_META_VERSION, PoolDecommissionInfo, PoolMeta, PoolSpaceInfo, PoolStatus, QueuedDecommissionEntry,
+        apply_decommission_status_space_info, await_decommission_worker, bind_decommission_cancelers,
+        bind_missing_decommission_cancelers, cancel_decommission_canceler, clamp_decommission_entry_concurrency,
+        classify_decommission_terminal_state, count_decommission_item, decommission_cancel_signal_result,
+        decommission_entry_queue_capacity, decommission_item_size, decommission_meta_bucket_options,
+        decommission_start_pool_state, decommission_unresolved_listing_error, dedup_indices,
+        default_decommission_bucket_concurrency, default_decommission_entry_concurrency, drain_decommission_entry_queue,
+        enqueue_decommission_entry, ensure_decommission_cancel_allowed, ensure_decommission_clear_allowed,
+        ensure_decommission_generation, ensure_decommission_listing_disks_available, ensure_decommission_not_rebalancing,
+        ensure_decommission_start_allowed, ensure_decommission_start_keeps_active_pool, ensure_decommission_start_local_leader,
         ensure_decommission_start_pool_states, ensure_decommission_start_rebalance_meta_allowed,
         ensure_decommission_start_target_capacity, ensure_decommission_terminal_operation_supported,
         ensure_local_decommission_pool_leaders, ensure_valid_decommission_pool_index, first_resumable_decommission_queue_indices,
         get_by_index, guard_decommission_cancelers, has_active_decommission_canceler, is_decommission_active,
         is_decommission_cancel_requested, load_decommission_entry_versions, local_decommission_queue_prefix,
         mark_decommission_bucket_done, merge_pool_status_refresh, missing_decommission_worker_prefix,
-        observe_decommission_terminal_reload_result, pool_meta_has_active_decommission, require_decommission_store,
-        reserve_decommission_start_cancelers, resolve_decommission_bucket_done_save_result, resolve_decommission_bucket_state,
-        resolve_decommission_check_after_list_result, resolve_decommission_entry_cleanup_delete_result,
-        resolve_decommission_entry_exact_versions, resolve_decommission_entry_reload_result,
-        resolve_decommission_listing_worker_result, resolve_decommission_optional_bucket_config_result,
-        resolve_decommission_partial_listing_entry, resolve_decommission_pool_meta_reload_result,
-        resolve_decommission_preflight_heal_result, resolve_decommission_progress_save_result,
-        resolve_decommission_terminal_mark_after_error_result, resolve_decommission_terminal_mark_result,
-        resolve_decommission_update_after_result, resolve_start_decommission_pool_meta_reload_result,
-        rollback_start_decommission_pool_meta, run_decommission_buckets_bounded, run_decommission_listing_with_retry,
-        run_decommission_listing_with_retry_and_drain, run_decommission_side_effect, should_cleanup_decommission_source_entry,
-        should_continue_decommission_queue, should_count_decommission_version_complete,
-        should_preserve_decommission_canceled_state, should_reject_decommission_cancel_as_terminal,
-        should_retry_decommission_cancel_reload, should_retry_decommission_listing, should_skip_canceled_decommission_routine,
-        spawn_decommission_index_cancelers, split_decommission_buckets, take_and_cancel_decommission_canceler,
-        take_decommission_canceler, track_decommission_current_object, track_decommission_current_object_stage,
-        update_decommission_for_operation, validate_start_decommission_request, wait_decommission_listing_retry,
-        wait_decommission_worker_drain, with_decommission_entry_context,
+        observe_decommission_terminal_reload_result, pool_meta_has_active_decommission,
+        reconcile_decommission_unresolved_entries_for_completion, record_decommission_unresolved_entry,
+        require_decommission_store, reserve_decommission_start_cancelers, resolve_decommission_bucket_done_save_result,
+        resolve_decommission_bucket_state, resolve_decommission_check_after_list_result,
+        resolve_decommission_entry_cleanup_delete_result, resolve_decommission_entry_exact_versions,
+        resolve_decommission_entry_reload_result, resolve_decommission_listing_worker_result,
+        resolve_decommission_optional_bucket_config_result, resolve_decommission_partial_listing_entry,
+        resolve_decommission_pool_meta_reload_result, resolve_decommission_preflight_heal_result,
+        resolve_decommission_progress_save_result, resolve_decommission_terminal_mark_after_error_result,
+        resolve_decommission_terminal_mark_result, resolve_decommission_update_after_result,
+        resolve_start_decommission_pool_meta_reload_result, rollback_start_decommission_pool_meta,
+        run_decommission_buckets_bounded, run_decommission_listing_with_retry, run_decommission_listing_with_retry_and_drain,
+        run_decommission_side_effect, should_cleanup_decommission_source_entry, should_continue_decommission_queue,
+        should_count_decommission_version_complete, should_preserve_decommission_canceled_state,
+        should_reject_decommission_cancel_as_terminal, should_retry_decommission_cancel_reload,
+        should_retry_decommission_listing, should_skip_canceled_decommission_routine, spawn_decommission_index_cancelers,
+        split_decommission_buckets, take_and_cancel_decommission_canceler, take_decommission_canceler,
+        track_decommission_current_object, track_decommission_current_object_stage, update_decommission_for_operation,
+        validate_start_decommission_request, wait_decommission_listing_retry, wait_decommission_worker_drain,
+        with_decommission_entry_context,
     };
+    use crate::bucket::metadata_sys;
     use crate::data_movement;
-    use crate::disk::endpoint::Endpoint;
+    use crate::disk::{STORAGE_FORMAT_FILE, endpoint::Endpoint};
     use crate::error::{Error, StorageError};
     use crate::layout::endpoints::{EndpointServerPools, Endpoints, PoolEndpoints};
     use crate::runtime::instance::InstanceContext;
     use crate::services::rebalance::{RebalStatus, RebalanceInfo, RebalanceMeta, RebalanceStats};
+    use crate::storage_api_contracts::bucket::MakeBucketOptions;
     use crate::store::ECStore;
     use rustfs_filemeta::{FileInfo, FileInfoVersions, MetaCacheEntry, ObjectPartInfo};
     use rustfs_filemeta::{MetaCacheEntries, MetadataResolutionParams};
@@ -7622,7 +7814,8 @@ mod pools_tests {
 
     #[test]
     fn test_resolve_decommission_partial_listing_entry_rejects_unresolved_metadata() {
-        let err = resolve_decommission_partial_listing_entry(
+        let generation = OffsetDateTime::now_utc();
+        let unresolved_entry = resolve_decommission_partial_listing_entry(
             MetaCacheEntries(vec![None]),
             MetadataResolutionParams {
                 dir_quorum: 2,
@@ -7635,23 +7828,160 @@ mod pools_tests {
             1,
             2,
             3,
+            generation,
         )
         .expect_err("unresolved partial listing must fail closed");
 
-        let message = err.to_string();
+        assert_eq!(unresolved_entry.bucket, "bucket-a");
+        assert_eq!(unresolved_entry.object, "prefix/");
+        assert_eq!(unresolved_entry.pool_index, 2);
+        assert_eq!(unresolved_entry.set_index, 3);
+        assert_eq!(unresolved_entry.source_generation, generation);
+        assert_eq!(unresolved_entry.candidate_count, 0);
+        assert_eq!(unresolved_entry.disk_error_count, 1);
+        assert_eq!(unresolved_entry.reason, "metadata_resolution_failed");
+
+        let message = decommission_unresolved_listing_error(&unresolved_entry).to_string();
         assert!(message.contains("decommission listing could not resolve metadata"));
         assert!(message.contains("bucket-a/prefix/"));
         assert!(message.contains("pool 2 set 3"));
         assert!(message.contains("1 disk error(s)"));
     }
 
+    #[test]
+    fn unresolved_entry_ledger_blocks_unverified_completion_and_reconciles_after_verified_sweep() {
+        let generation = OffsetDateTime::now_utc();
+        let mut pool_meta = PoolMeta {
+            version: POOL_META_VERSION,
+            pools: vec![PoolStatus {
+                id: 0,
+                cmd_line: "/data/pool".to_string(),
+                last_update: generation,
+                decommission: Some(PoolDecommissionInfo {
+                    start_time: Some(generation),
+                    ..Default::default()
+                }),
+            }],
+            dont_save: true,
+        };
+        let unresolved_entry = DecommissionUnresolvedEntry {
+            bucket: "bucket-a".to_string(),
+            object: "object-a".to_string(),
+            pool_index: 0,
+            set_index: 0,
+            source_generation: generation,
+            candidate_count: 1,
+            disk_error_count: 0,
+            observed_at: generation,
+            reason: "metadata_resolution_failed".to_string(),
+        };
+
+        assert!(
+            record_decommission_unresolved_entry(&mut pool_meta, 0, generation, unresolved_entry)
+                .expect("active generation should accept unresolved entry")
+        );
+        let err = reconcile_decommission_unresolved_entries_for_completion(&mut pool_meta, 0, None)
+            .expect_err("unverified completion must retain unresolved entries");
+        assert!(err.to_string().contains("1 unresolved listing entries remain"));
+        assert_eq!(
+            pool_meta.pools[0]
+                .decommission
+                .as_ref()
+                .expect("decommission should exist")
+                .unresolved_entries
+                .len(),
+            1
+        );
+
+        reconcile_decommission_unresolved_entries_for_completion(&mut pool_meta, 0, Some(generation))
+            .expect("a successful same-generation final sweep should reconcile stale entries");
+        assert!(
+            pool_meta.pools[0]
+                .decommission
+                .as_ref()
+                .expect("decommission should exist")
+                .unresolved_entries
+                .is_empty()
+        );
+    }
+
+    #[tokio::test]
+    async fn final_sweep_persists_unresolved_entry_from_real_listing() {
+        let (dirs, store) = metadata_sys::test_support::isolated_store_over_temp_disks().await;
+        let bucket = "decommission-final-sweep-unresolved";
+        let object = "corrupt-object";
+        store
+            .peer_sys
+            .make_bucket(bucket, &MakeBucketOptions::default())
+            .await
+            .expect("test bucket should be created");
+        metadata_sys::init_bucket_metadata_sys(store.clone(), vec![bucket.to_string()]).await;
+
+        let generation = OffsetDateTime::now_utc();
+        {
+            let mut pool_meta = store.pool_meta.write().await;
+            pool_meta.dont_save = false;
+            pool_meta.pools[0].decommission = Some(PoolDecommissionInfo {
+                start_time: Some(generation),
+                ..Default::default()
+            });
+        }
+
+        for (disk_index, dir) in dirs.iter().enumerate() {
+            let object_dir = dir.path().join(bucket).join(object);
+            tokio::fs::create_dir_all(&object_dir)
+                .await
+                .expect("corrupt object directory should be created");
+            tokio::fs::write(object_dir.join(STORAGE_FORMAT_FILE), format!("corrupt-xl-meta-{disk_index}").into_bytes())
+                .await
+                .expect("divergent corrupt metadata should be written");
+        }
+
+        let err = store
+            .check_after_decommission(0, generation)
+            .await
+            .expect_err("real final sweep must fail closed on unresolved listing metadata");
+        assert!(err.to_string().contains("decommission listing could not resolve metadata"));
+
+        let in_memory_entries = store.pool_meta.read().await.pools[0]
+            .decommission
+            .as_ref()
+            .expect("decommission should remain active")
+            .unresolved_entries
+            .clone();
+        assert_eq!(in_memory_entries.len(), 1);
+        let unresolved_entry = &in_memory_entries[0];
+        assert_eq!(unresolved_entry.bucket, bucket);
+        assert_eq!(unresolved_entry.object, object);
+        assert_eq!(unresolved_entry.pool_index, 0);
+        assert_eq!(unresolved_entry.set_index, 0);
+        assert_eq!(unresolved_entry.source_generation, generation);
+        assert_eq!(unresolved_entry.candidate_count, 4);
+        assert_eq!(unresolved_entry.disk_error_count, 0);
+        assert_eq!(unresolved_entry.reason, "metadata_resolution_failed");
+
+        let mut restored = PoolMeta::default();
+        restored
+            .load_for_startup(store.pools[0].clone())
+            .await
+            .expect("persisted pool metadata should reload after the final-sweep failure");
+        assert_eq!(
+            restored.pools[0]
+                .decommission
+                .as_ref()
+                .expect("reloaded decommission should exist")
+                .unresolved_entries,
+            in_memory_entries
+        );
+    }
+
     #[tokio::test]
     async fn test_record_decommission_entry_error_cancels_listing_and_preserves_first_error() {
         let entry_error = Arc::new(tokio::sync::Mutex::new(None));
         let rx = CancellationToken::new();
 
-        record_decommission_entry_error(&entry_error, &rx, Error::SlowDown).await;
-        record_decommission_entry_error(&entry_error, &rx, Error::OperationCanceled).await;
+        assert!(record_decommission_entry_error(&entry_error, &rx, Error::SlowDown).await);
+        assert!(!record_decommission_entry_error(&entry_error, &rx, Error::OperationCanceled).await);
 
         assert!(rx.is_cancelled());
         assert!(matches!(*entry_error.lock().await, Some(Error::SlowDown)));
@@ -7663,7 +7993,7 @@ mod pools_tests {
         let rx = CancellationToken::new();
         rx.cancel();
 
-        record_decommission_entry_error(&entry_error, &rx, Error::SlowDown).await;
+        assert!(!record_decommission_entry_error(&entry_error, &rx, Error::SlowDown).await);
 
         assert!(entry_error.lock().await.is_none());
     }

rustfs/src/app/admin_usecase.rs

@@ -16,7 +16,8 @@
 
 use super::storage_api::admin_usecase::admin::get_server_info;
 use super::storage_api::admin_usecase::capacity::{
-    PoolDecommissionInfo, PoolStatus, RebalStatus, get_total_usable_capacity, get_total_usable_capacity_free,
+    DecommissionUnresolvedEntry, PoolDecommissionInfo, PoolStatus, RebalStatus, get_total_usable_capacity,
+    get_total_usable_capacity_free,
 };
 use super::storage_api::admin_usecase::contract::StorageAdminApi;
 use super::storage_api::admin_usecase::contract::bucket::{BucketOperations as _, BucketOptions};
@@ -107,6 +108,8 @@ pub struct AdminPoolDecommissionInfo {
     pub bytes_failed: usize,
     #[serde(rename = "waitingReason")]
     pub waiting_reason: Option<String>,
+    #[serde(rename = "unresolvedEntries", skip_serializing_if = "Vec::is_empty")]
+    pub unresolved_entries: Vec<DecommissionUnresolvedEntry>,
 }
 
 #[derive(Debug, Clone, serde::Serialize)]
@@ -619,6 +622,7 @@ impl DefaultAdminUsecase {
             bytes_done: info.bytes_done,
             bytes_failed: info.bytes_failed,
             waiting_reason,
+            unresolved_entries: info.unresolved_entries,
         }
     }
 
@@ -676,7 +680,7 @@ impl DefaultAdminUsecase {
 
 #[cfg(test)]
 mod tests {
-    use super::super::storage_api::admin_usecase::capacity::{PoolDecommissionInfo, PoolStatus};
+    use super::super::storage_api::admin_usecase::capacity::{DecommissionUnresolvedEntry, PoolDecommissionInfo, PoolStatus};
     use super::*;
     use time::OffsetDateTime;
     use tracing_subscriber::{Layer, Registry, layer::Context, prelude::*};
@@ -987,6 +991,17 @@ mod tests {
                     items_decommission_failed: 1,
                     bytes_done: 1024,
                     bytes_failed: 64,
+                    unresolved_entries: vec![DecommissionUnresolvedEntry {
+                        bucket: "bucket-a".to_string(),
+                        object: "prefix/unresolved.txt".to_string(),
+                        pool_index: 3,
+                        set_index: 1,
+                        source_generation: OffsetDateTime::UNIX_EPOCH,
+                        candidate_count: 2,
+                        disk_error_count: 1,
+                        observed_at: OffsetDateTime::UNIX_EPOCH,
+                        reason: "metadata_resolution_failed".to_string(),
+                    }],
                     ..Default::default()
                 }),
             },
@@ -1010,6 +1025,13 @@ mod tests {
         assert_eq!(value["decommissionInfo"]["objectsDecommissionedFailed"], 1);
         assert_eq!(value["decommissionInfo"]["bytesDecommissioned"], 1024);
         assert_eq!(value["decommissionInfo"]["bytesDecommissionedFailed"], 64);
+        assert_eq!(value["decommissionInfo"]["unresolvedEntries"][0]["bucket"], "bucket-a");
+        assert_eq!(value["decommissionInfo"]["unresolvedEntries"][0]["object"], "prefix/unresolved.txt");
+        assert_eq!(
+            value["decommissionInfo"]["unresolvedEntries"][0]["sourceGeneration"],
+            "1970-01-01T00:00:00Z"
+        );
+        assert_eq!(value["decommissionInfo"]["unresolvedEntries"][0]["reason"], "metadata_resolution_failed");
         assert_eq!(value["decommissionInfo"]["waitingReason"], "queued");
     }
 

rustfs/src/app/storage_api.rs

@@ -31,6 +31,7 @@ pub(crate) mod admin {
 }
 
 pub(crate) mod capacity {
+    pub(crate) type DecommissionUnresolvedEntry = crate::storage::storage_api::ecstore_capacity::DecommissionUnresolvedEntry;
     pub(crate) type PoolDecommissionInfo = crate::storage::storage_api::ecstore_capacity::PoolDecommissionInfo;
     pub(crate) type PoolStatus = crate::storage::storage_api::ecstore_capacity::PoolStatus;
     pub(crate) type RebalStatus = crate::storage::storage_api::ecstore_rebalance::RebalStatus;

rustfs/src/storage/storage_api.rs

@@ -398,7 +398,7 @@ pub(crate) mod ecstore_bucket {
 
 pub(crate) mod ecstore_capacity {
     pub(crate) use rustfs_ecstore::api::capacity::{
-        PoolDecommissionInfo, PoolStatus, get_total_usable_capacity, get_total_usable_capacity_free,
+        DecommissionUnresolvedEntry, PoolDecommissionInfo, PoolStatus, get_total_usable_capacity, get_total_usable_capacity_free,
         is_reserved_or_invalid_bucket,
     };
 }