fix: resolve silent failure in MQTT bucket event notifications (#2112)

Co-authored-by: houseme <housemecn@gmail.com>

crates/notify/src/registry.rs

@@ -293,10 +293,17 @@ impl TargetRegistry {
                 }
             }
 
-            let Some(store) = rustfs_ecstore::global::new_object_layer_fn() else {
+            let store = match rustfs_ecstore::global::new_object_layer_fn() {
-                return Err(TargetError::ServerNotInitialized(
+                Some(s) => s,
-                    "Failed to save target configuration: server storage not initialized".to_string(),
+                None => {
-                ));
+                    warn!(
+                        "Object store not available at notification init; skipping config persistence. \
+                         {} target(s) active in memory.",
+                        successful_targets.len()
+                    );
+                    info!(count = successful_targets.len(), "All target processing completed");
+                    return Ok(successful_targets);
+                }
             };
 
             match rustfs_ecstore::config::com::save_server_config(store, &new_config).await {

rustfs/src/server/event.rs

@@ -13,7 +13,6 @@
 //  limitations under the License.
 
 use crate::app::context::resolve_server_config;
-use rustfs_config::DEFAULT_DELIMITER;
 use tracing::{error, info, instrument, warn};
 
 fn server_config_from_context() -> Option<rustfs_ecstore::config::Config> {
@@ -58,32 +57,12 @@ pub(crate) async fn init_event_notifier() {
         }
     };
 
-    info!(
-        target: "rustfs::main::init_event_notifier",
-        "Global server configuration loaded successfully"
-    );
-    // 2. Check if at least one notify subsystem exists in the configuration, and skip only when neither is present.
-    let mqtt_configured = server_config
-        .get_value(rustfs_config::notify::NOTIFY_MQTT_SUB_SYS, DEFAULT_DELIMITER)
-        .is_some();
-    let webhook_configured = server_config
-        .get_value(rustfs_config::notify::NOTIFY_WEBHOOK_SUB_SYS, DEFAULT_DELIMITER)
-        .is_some();
-
-    if !mqtt_configured && !webhook_configured {
-        info!(
-            target: "rustfs::main::init_event_notifier",
-            "'notify' subsystem not configured, skipping event notifier initialization."
-        );
-        return;
-    }
-
     info!(
         target: "rustfs::main::init_event_notifier",
         "Event notifier configuration found, proceeding with initialization."
     );
 
-    // 3. Initialize the notification system asynchronously with a global configuration
+    // 2. Initialize the notification system asynchronously with a global configuration
     // Use direct await for better error handling and faster initialization
     if let Err(e) = rustfs_notify::initialize(server_config).await {
         error!("Failed to initialize event notifier system: {}", e);