fix(admin): reduce memory usage and verbose logging for large clusters (#8927)

* fix(admin): reduce memory usage and verbose logging for large clusters (#8919)

The admin server used excessive memory and produced thousands of log lines
on clusters with many volumes (e.g., 33k volumes). Three root causes:

1. Scanner duplicated all volume metrics: getVolumeHealthMetrics() created
   VolumeHealthMetrics objects, then convertToTaskMetrics() copied them all
   into identical types.VolumeHealthMetrics. Now uses the task-system type
   directly, eliminating the duplicate allocation and removing convertToTaskMetrics.

2. All previous task states loaded at startup: LoadTasksFromPersistence read
   and deserialized every .pb file from disk, logging each one. With thousands
   of balance tasks persisted, this caused massive startup I/O, memory usage,
   and log noise (including unguarded DEBUG glog.Infof per task). Now starts
   with an empty queue — the scanner re-detects current needs from live cluster
   state. Terminal tasks are purged from memory and disk when new scan results
   arrive.

3. Verbose per-volume/per-node logging: V(2) and V(3) logs produced thousands
   of lines per scan. Per-volume logs bumped to V(4), per-node/rack/disk logs
   bumped to V(3). Topology summary now logs counts instead of full node ID arrays.

Also removes lastTopologyInfo field from MaintenanceScanner — the raw protobuf
topology is returned as a local value and not retained between 30-minute scans.

* fix(admin): delete stale task files at startup, add DeleteAllTaskStates

Old task .pb files from previous runs were left on disk. The periodic
CleanupCompletedTasks still loads all files to find completed ones —
the same expensive 4GB path from the pprof profile.

Now at startup, DeleteAllTaskStates removes all .pb files by scanning
the directory without reading or deserializing them. The scanner will
re-detect any tasks still needed from live cluster state.

* fix(admin): don't persist terminal tasks to disk

CompleteTask was saving failed/completed tasks to disk where they'd
accumulate. The periodic cleanup only triggered for completed tasks,
not failed ones. Now terminal tasks are deleted from disk immediately
and only kept in memory for the current session's UI.

* fix(admin): cap in-memory tasks to 100 per job type

Without a limit, the task map grows unbounded — balance could create
thousands of pending tasks for a cluster with many imbalanced volumes.
Now AddTask rejects new tasks when a job type already has 100 in the
queue. The scanner will re-detect skipped volumes on the next scan.

* fix(admin): address PR review - memory-only purge, active-only capacity

- purgeTerminalTasks now only cleans in-memory map (terminal tasks are
  already deleted from disk by CompleteTask)
- Per-type capacity limit counts only active tasks (pending/assigned/
  in_progress), not terminal ones
- When at capacity, purge terminal tasks first before rejecting

* fix(admin): fix orphaned comment, add TaskStatusCancelled to terminal switch

- Move hasQueuedOrActiveTaskForVolume comment to its function definition
- Add TaskStatusCancelled to the terminal state switch in CompleteTask
  so cancelled task files are deleted from disk

weed/admin/dash/config_persistence.go

@@ -1091,7 +1091,7 @@ func (cp *ConfigPersistence) loadTaskStateLocked(taskID string) (*maintenance.Ma
 	// Convert protobuf to maintenance task
 	task := cp.protobufToMaintenanceTask(taskStateFile.Task)
 
-	glog.V(2).Infof("Loaded task state for task %s from %s", taskID, taskFilePath)
+	glog.V(3).Infof("Loaded task state for task %s from %s", taskID, taskFilePath)
 	return task, nil
 }
 
@@ -1135,6 +1135,43 @@ func (cp *ConfigPersistence) loadAllTaskStatesLocked() ([]*maintenance.Maintenan
 	return tasks, nil
 }
 
+// DeleteAllTaskStates removes all task state .pb files from disk without reading them.
+// Used at startup to clean up stale files from previous runs — the scanner will
+// re-detect any tasks that are still needed from live cluster state.
+func (cp *ConfigPersistence) DeleteAllTaskStates() error {
+	cp.tasksMu.Lock()
+	defer cp.tasksMu.Unlock()
+
+	if cp.dataDir == "" {
+		return nil
+	}
+
+	tasksDir := filepath.Join(cp.dataDir, TasksSubdir)
+	entries, err := os.ReadDir(tasksDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return fmt.Errorf("failed to read tasks directory: %w", err)
+	}
+
+	var removed int
+	for _, entry := range entries {
+		if !entry.IsDir() && filepath.Ext(entry.Name()) == ".pb" {
+			if err := os.Remove(filepath.Join(tasksDir, entry.Name())); err != nil && !os.IsNotExist(err) {
+				glog.Warningf("Failed to delete task file %s: %v", entry.Name(), err)
+			} else {
+				removed++
+			}
+		}
+	}
+
+	if removed > 0 {
+		glog.Infof("Cleaned up %d stale task files from disk", removed)
+	}
+	return nil
+}
+
 // DeleteTaskState removes a task state file from disk
 func (cp *ConfigPersistence) DeleteTaskState(taskID string) error {
 	cp.tasksMu.Lock()

weed/admin/maintenance/maintenance_queue.go

@@ -33,80 +33,16 @@ func (mq *MaintenanceQueue) SetPersistence(persistence TaskPersistence) {
 	glog.V(1).Infof("Maintenance queue configured with task persistence")
 }
 
-// LoadTasksFromPersistence loads tasks from persistent storage on startup
+// LoadTasksFromPersistence is called on startup. Previous task states are NOT loaded
+// into memory — the maintenance scanner will re-detect current needs from the live
+// cluster state. Stale task files from previous runs are deleted from disk.
 func (mq *MaintenanceQueue) LoadTasksFromPersistence() error {
-	if mq.persistence == nil {
-		glog.V(1).Infof("No task persistence configured, skipping task loading")
-		return nil
-	}
-
-	mq.mutex.Lock()
-	defer mq.mutex.Unlock()
-
-	glog.Infof("Loading tasks from persistence...")
-
-	tasks, err := mq.persistence.LoadAllTaskStates()
-	if err != nil {
-		return fmt.Errorf("failed to load task states: %w", err)
-	}
-
-	glog.Infof("DEBUG LoadTasksFromPersistence: Found %d tasks in persistence", len(tasks))
-
-	// Reset task maps
-	mq.tasks = make(map[string]*MaintenanceTask)
-	mq.pendingTasks = make([]*MaintenanceTask, 0)
-
-	// Load tasks by status
-	for _, task := range tasks {
-		glog.Infof("DEBUG LoadTasksFromPersistence: Loading task %s (type: %s, status: %s, scheduled: %v)", task.ID, task.Type, task.Status, task.ScheduledAt)
-		mq.tasks[task.ID] = task
-
-		switch task.Status {
-		case TaskStatusPending:
-			glog.Infof("DEBUG LoadTasksFromPersistence: Adding task %s to pending queue", task.ID)
-			mq.pendingTasks = append(mq.pendingTasks, task)
-		case TaskStatusAssigned, TaskStatusInProgress:
-			// For assigned/in-progress tasks, we need to check if the worker is still available
-			// If not, we should fail them and make them eligible for retry
-			if task.WorkerID != "" {
-				if _, exists := mq.workers[task.WorkerID]; !exists {
-					glog.Warningf("Task %s was assigned to unavailable worker %s, marking as failed", task.ID, task.WorkerID)
-					task.Status = TaskStatusFailed
-					task.Error = "Worker unavailable after restart"
-					completedTime := time.Now()
-					task.CompletedAt = &completedTime
-
-					// Check if it should be retried
-					if task.RetryCount < task.MaxRetries {
-						task.RetryCount++
-						task.Status = TaskStatusPending
-						task.WorkerID = ""
-						task.StartedAt = nil
-						task.CompletedAt = nil
-						task.Error = ""
-						task.ScheduledAt = time.Now().Add(1 * time.Minute) // Retry after restart delay
-						glog.Infof("DEBUG LoadTasksFromPersistence: Retrying task %s, adding to pending queue", task.ID)
-						mq.pendingTasks = append(mq.pendingTasks, task)
+	if mq.persistence != nil {
+		if err := mq.persistence.DeleteAllTaskStates(); err != nil {
+			glog.Warningf("Failed to clean up old task files: %v", err)
 		}
 	}
-			}
-		}
-
-		// Sync task with ActiveTopology for capacity tracking
-		if mq.integration != nil {
-			mq.integration.SyncTask(task)
-		}
-	}
-
-	// Sort pending tasks by priority and schedule time
-	sort.Slice(mq.pendingTasks, func(i, j int) bool {
-		if mq.pendingTasks[i].Priority != mq.pendingTasks[j].Priority {
-			return mq.pendingTasks[i].Priority > mq.pendingTasks[j].Priority
-		}
-		return mq.pendingTasks[i].ScheduledAt.Before(mq.pendingTasks[j].ScheduledAt)
-	})
-
-	glog.Infof("Loaded %d tasks from persistence (%d pending)", len(tasks), len(mq.pendingTasks))
+	glog.Infof("Task queue initialized (previous tasks will be re-detected by scanner)")
 	return nil
 }
 
@@ -119,6 +55,14 @@ func (mq *MaintenanceQueue) saveTaskState(task *MaintenanceTask) {
 	}
 }
 
+func (mq *MaintenanceQueue) deleteTaskState(taskID string) {
+	if mq.persistence != nil {
+		if err := mq.persistence.DeleteTaskState(taskID); err != nil {
+			glog.V(2).Infof("Failed to delete task state for %s: %v", taskID, err)
+		}
+	}
+}
+
 // cleanupCompletedTasks removes old completed tasks beyond the retention limit
 func (mq *MaintenanceQueue) cleanupCompletedTasks() {
 	if mq.persistence != nil {
@@ -128,10 +72,24 @@ func (mq *MaintenanceQueue) cleanupCompletedTasks() {
 	}
 }
 
+const MaxTasksPerType = 100
+
 // AddTask adds a new maintenance task to the queue with deduplication
 func (mq *MaintenanceQueue) AddTask(task *MaintenanceTask) {
 	mq.mutex.Lock()
 
+	// Enforce per-type capacity limit (only counting active tasks)
+	if mq.countActiveTasksByType(task.Type) >= MaxTasksPerType {
+		// Purge terminal tasks first, then recheck
+		mq.purgeTerminalTasksLocked()
+		if mq.countActiveTasksByType(task.Type) >= MaxTasksPerType {
+			mq.mutex.Unlock()
+			glog.V(1).Infof("Task skipped (type %s at capacity %d): volume %d on %s",
+				task.Type, MaxTasksPerType, task.VolumeID, task.Server)
+			return
+		}
+	}
+
 	// Enforce one queued/active task per volume (across all task types).
 	if mq.hasQueuedOrActiveTaskForVolume(task.VolumeID) {
 		mq.mutex.Unlock()
@@ -197,6 +155,30 @@ func (mq *MaintenanceQueue) AddTask(task *MaintenanceTask) {
 		taskSnapshot.ID, taskSnapshot.Type, taskSnapshot.VolumeID, taskSnapshot.Server, taskSnapshot.Priority, scheduleInfo, taskSnapshot.Reason)
 }
 
+// countActiveTasksByType returns the number of active (non-terminal) tasks of a given type. Caller must hold mq.mutex.
+func (mq *MaintenanceQueue) countActiveTasksByType(taskType MaintenanceTaskType) int {
+	count := 0
+	for _, t := range mq.tasks {
+		if t.Type == taskType {
+			switch t.Status {
+			case TaskStatusPending, TaskStatusAssigned, TaskStatusInProgress:
+				count++
+			}
+		}
+	}
+	return count
+}
+
+// purgeTerminalTasksLocked removes terminal tasks from the in-memory map. Caller must hold mq.mutex.
+func (mq *MaintenanceQueue) purgeTerminalTasksLocked() {
+	for id, task := range mq.tasks {
+		switch task.Status {
+		case TaskStatusCompleted, TaskStatusFailed, TaskStatusCancelled:
+			delete(mq.tasks, id)
+		}
+	}
+}
+
 // hasQueuedOrActiveTaskForVolume checks if any pending/assigned/in-progress task already exists for this volume.
 // Caller must hold mq.mutex.
 func (mq *MaintenanceQueue) hasQueuedOrActiveTaskForVolume(volumeID uint32) bool {
@@ -273,6 +255,9 @@ func (mq *MaintenanceQueue) CancelPendingTasksByType(taskType MaintenanceTaskTyp
 
 // AddTasksFromResults converts detection results to tasks and adds them to the queue
 func (mq *MaintenanceQueue) AddTasksFromResults(results []*TaskDetectionResult) {
+	// Purge terminal tasks from memory before adding new ones
+	mq.purgeTerminalTasks()
+
 	for _, result := range results {
 		// Validate that task has proper typed parameters
 		if result.TypedParams == nil {
@@ -297,6 +282,21 @@ func (mq *MaintenanceQueue) AddTasksFromResults(results []*TaskDetectionResult)
 	}
 }
 
+// purgeTerminalTasks removes completed/failed/cancelled tasks from memory.
+// Terminal tasks are already deleted from disk by CompleteTask, so this
+// only needs to clean up the in-memory map.
+func (mq *MaintenanceQueue) purgeTerminalTasks() {
+	mq.mutex.Lock()
+	before := len(mq.tasks)
+	mq.purgeTerminalTasksLocked()
+	purged := before - len(mq.tasks)
+	mq.mutex.Unlock()
+
+	if purged > 0 {
+		glog.V(1).Infof("Purged %d terminal tasks from memory", purged)
+	}
+}
+
 // GetNextTask returns the next available task for a worker
 func (mq *MaintenanceQueue) GetNextTask(workerID string, capabilities []MaintenanceTaskType) *MaintenanceTask {
 	// Use read lock for initial checks and search
@@ -570,7 +570,6 @@ func (mq *MaintenanceQueue) CompleteTask(taskID string, error string) {
 		}
 	}
 	taskStatus := task.Status
-	taskCount := len(mq.tasks)
 	// Snapshot task state while lock is still held to avoid data race
 	var taskToSaveSnapshot *MaintenanceTask
 	if taskToSave != nil {
@@ -578,9 +577,18 @@ func (mq *MaintenanceQueue) CompleteTask(taskID string, error string) {
 	}
 	mq.mutex.Unlock()
 
-	// Save task state to persistence outside the lock
+	// Only persist non-terminal tasks (retries). Completed/failed tasks stay
+	// in memory for the UI but are not written to disk — they would just
+	// accumulate and slow down future startups.
 	if taskToSaveSnapshot != nil {
+		switch taskStatus {
+		case TaskStatusPending:
+			// Retry — save so the task survives a restart
 			mq.saveTaskState(taskToSaveSnapshot)
+		case TaskStatusCompleted, TaskStatusFailed, TaskStatusCancelled:
+			// Terminal — delete the file if one exists from a previous state
+			mq.deleteTaskState(taskToSaveSnapshot.ID)
+		}
 	}
 
 	if logFn != nil {
@@ -591,13 +599,6 @@ func (mq *MaintenanceQueue) CompleteTask(taskID string, error string) {
 	if taskStatus != TaskStatusPending {
 		mq.removePendingOperation(taskID)
 	}
-
-	// Periodically cleanup old completed tasks (when total task count is a multiple of 10)
-	if taskStatus == TaskStatusCompleted {
-		if taskCount%10 == 0 {
-			go mq.cleanupCompletedTasks()
-		}
-	}
 }
 
 // isNonRetriableError returns true for errors that will never succeed on retry,

weed/admin/maintenance/maintenance_queue_test.go

@@ -693,10 +693,11 @@ func (m *MockPersistence) SaveTaskState(task *MaintenanceTask) error
 func (m *MockPersistence) LoadTaskState(taskID string) (*MaintenanceTask, error)    { return nil, nil }
 func (m *MockPersistence) LoadAllTaskStates() ([]*MaintenanceTask, error)           { return m.tasks, nil }
 func (m *MockPersistence) DeleteTaskState(taskID string) error                      { return nil }
+func (m *MockPersistence) DeleteAllTaskStates() error                               { return nil }
 func (m *MockPersistence) CleanupCompletedTasks() error                             { return nil }
 func (m *MockPersistence) SaveTaskPolicy(taskType string, policy *TaskPolicy) error { return nil }
 
-func TestMaintenanceQueue_LoadTasksCapacitySync(t *testing.T) {
+func TestMaintenanceQueue_LoadTasksStartsEmpty(t *testing.T) {
 	// Setup
 	policy := &MaintenancePolicy{
 		TaskPolicies: map[string]*worker_pb.TaskPolicy{
@@ -704,56 +705,25 @@ func TestMaintenanceQueue_LoadTasksCapacitySync(t *testing.T) {
 		},
 	}
 	mq := NewMaintenanceQueue(policy)
-	integration := NewMaintenanceIntegration(mq, policy)
-	mq.SetIntegration(integration)
-	at := integration.GetActiveTopology()
 
-	topologyInfo := &master_pb.TopologyInfo{
-		DataCenterInfos: []*master_pb.DataCenterInfo{
-			{
-				Id: "dc1",
-				RackInfos: []*master_pb.RackInfo{
-					{
-						Id: "rack1",
-						DataNodeInfos: []*master_pb.DataNodeInfo{
-							{
-								Id: "server1",
-								DiskInfos: map[string]*master_pb.DiskInfo{
-									"hdd1": {DiskId: 1, VolumeCount: 1, MaxVolumeCount: 10},
-									"hdd2": {DiskId: 2, VolumeCount: 0, MaxVolumeCount: 10},
-								},
-							},
-						},
-					},
-				},
-			},
-		},
-	}
-	at.UpdateTopology(topologyInfo)
-
-	// Setup mock persistence with a pending task
-	taskID := "load_test_123"
+	// Setup mock persistence with tasks — these should NOT be loaded
 	mockTask := &MaintenanceTask{
-		ID:     taskID,
+		ID:     "old_task_123",
 		Type:   "balance",
 		Status: TaskStatusPending,
-		TypedParams: &worker_pb.TaskParams{
-			TaskId:  taskID,
-			Sources: []*worker_pb.TaskSource{{Node: "server1", DiskId: 1}},
-			Targets: []*worker_pb.TaskTarget{{Node: "server1", DiskId: 2}},
-		},
 	}
 	mq.SetPersistence(&MockPersistence{tasks: []*MaintenanceTask{mockTask}})
 
-	// Load tasks
+	// LoadTasksFromPersistence should be a no-op — scanner will re-detect
 	err := mq.LoadTasksFromPersistence()
 	if err != nil {
-		t.Fatalf("Failed to load tasks: %v", err)
+		t.Fatalf("LoadTasksFromPersistence failed: %v", err)
 	}
 
-	// Verify capacity is reserved in ActiveTopology after loading (9 left)
-	if at.GetEffectiveAvailableCapacity("server1", 2) != 9 {
-		t.Errorf("Expected capacity 9 after loading tasks, got %d", at.GetEffectiveAvailableCapacity("server1", 2))
+	// Queue should be empty — tasks will be re-detected by scanner
+	stats := mq.GetStats()
+	if stats.TotalTasks != 0 {
+		t.Errorf("Expected 0 tasks after startup, got %d", stats.TotalTasks)
 	}
 }
 

weed/admin/maintenance/maintenance_scanner.go

@@ -32,21 +32,18 @@ func NewMaintenanceScanner(adminClient AdminClient, policy *MaintenancePolicy, q
 
 // ScanForMaintenanceTasks analyzes the cluster and generates maintenance tasks
 func (ms *MaintenanceScanner) ScanForMaintenanceTasks() ([]*TaskDetectionResult, error) {
-	// Get volume health metrics
-	volumeMetrics, err := ms.getVolumeHealthMetrics()
+	// Get volume health metrics directly in task-system format, along with topology info
+	taskMetrics, topologyInfo, err := ms.getVolumeHealthMetrics()
 	if err != nil {
 		return nil, fmt.Errorf("failed to get volume health metrics: %w", err)
 	}
 
 	// Use task system for all task types
 	if ms.integration != nil {
-		// Convert metrics to task system format
-		taskMetrics := ms.convertToTaskMetrics(volumeMetrics)
-
 		// Update topology information for complete cluster view (including empty servers)
 		// This must happen before task detection to ensure EC placement can consider all servers
-		if ms.lastTopologyInfo != nil {
-			if err := ms.integration.UpdateTopologyInfo(ms.lastTopologyInfo); err != nil {
+		if topologyInfo != nil {
+			if err := ms.integration.UpdateTopologyInfo(topologyInfo); err != nil {
 				glog.Errorf("Failed to update topology info for empty servers: %v", err)
 				// Don't fail the scan - continue with just volume-bearing servers
 			} else {
@@ -70,9 +67,12 @@ func (ms *MaintenanceScanner) ScanForMaintenanceTasks() ([]*TaskDetectionResult,
 	return []*TaskDetectionResult{}, nil
 }
 
-// getVolumeHealthMetrics collects health information for all volumes
-func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*VolumeHealthMetrics, error) {
-	var metrics []*VolumeHealthMetrics
+// getVolumeHealthMetrics collects health information for all volumes.
+// Returns metrics in task-system format directly (no intermediate copy) and
+// the topology info for updating the active topology.
+func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*types.VolumeHealthMetrics, *master_pb.TopologyInfo, error) {
+	var metrics []*types.VolumeHealthMetrics
+	var topologyInfo *master_pb.TopologyInfo
 
 	glog.V(1).Infof("Collecting volume health metrics from master")
 	err := ms.adminClient.WithMasterClient(func(client master_pb.SeaweedClient) error {
@@ -89,30 +89,28 @@ func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*VolumeHealthMetrics,
 
 		volumeSizeLimitBytes := uint64(resp.VolumeSizeLimitMb) * 1024 * 1024 // Convert MB to bytes
 
-		// Track all nodes discovered in topology
-		var allNodesInTopology []string
-		var nodesWithVolumes []string
-		var nodesWithoutVolumes []string
+		// Track node counts for summary logging (avoid accumulating full ID slices)
+		var totalNodes, nodesWithVolumes, nodesWithoutVolumes int
 
 		for _, dc := range resp.TopologyInfo.DataCenterInfos {
-			glog.V(2).Infof("Processing datacenter: %s", dc.Id)
+			glog.V(3).Infof("Processing datacenter: %s", dc.Id)
 			for _, rack := range dc.RackInfos {
-				glog.V(2).Infof("Processing rack: %s in datacenter: %s", rack.Id, dc.Id)
+				glog.V(3).Infof("Processing rack: %s in datacenter: %s", rack.Id, dc.Id)
 				for _, node := range rack.DataNodeInfos {
-					allNodesInTopology = append(allNodesInTopology, node.Id)
-					glog.V(2).Infof("Found volume server in topology: %s (disks: %d)", node.Id, len(node.DiskInfos))
+					totalNodes++
+					glog.V(3).Infof("Found volume server in topology: %s (disks: %d)", node.Id, len(node.DiskInfos))
 
 					hasVolumes := false
 					// Process each disk on this node
 					for diskType, diskInfo := range node.DiskInfos {
 						if len(diskInfo.VolumeInfos) > 0 {
 							hasVolumes = true
-							glog.V(2).Infof("Volume server %s disk %s has %d volumes", node.Id, diskType, len(diskInfo.VolumeInfos))
+							glog.V(3).Infof("Volume server %s disk %s has %d volumes", node.Id, diskType, len(diskInfo.VolumeInfos))
 						}
 
 						// Process volumes on this specific disk
 						for _, volInfo := range diskInfo.VolumeInfos {
-							metric := &VolumeHealthMetrics{
+							metric := &types.VolumeHealthMetrics{
 								VolumeID:         volInfo.Id,
 								Server:           node.Id,
 								ServerAddress:    node.Address,
@@ -138,7 +136,7 @@ func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*VolumeHealthMetrics,
 							}
 							metric.Age = time.Since(metric.LastModified)
 
-							glog.V(3).Infof("Volume %d on %s:%s (ID %d): size=%d, limit=%d, fullness=%.2f",
+							glog.V(4).Infof("Volume %d on %s:%s (ID %d): size=%d, limit=%d, fullness=%.2f",
 								metric.VolumeID, metric.Server, metric.DiskType, metric.DiskId, metric.Size, volumeSizeLimitBytes, metric.FullnessRatio)
 
 							metrics = append(metrics, metric)
@@ -146,29 +144,27 @@ func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*VolumeHealthMetrics,
 					}
 
 					if hasVolumes {
-						nodesWithVolumes = append(nodesWithVolumes, node.Id)
+						nodesWithVolumes++
 					} else {
-						nodesWithoutVolumes = append(nodesWithoutVolumes, node.Id)
+						nodesWithoutVolumes++
 						glog.V(1).Infof("Volume server %s found in topology but has no volumes", node.Id)
 					}
 				}
 			}
 		}
 
-		glog.Infof("Topology discovery complete:")
-		glog.Infof("  - Total volume servers in topology: %d (%v)", len(allNodesInTopology), allNodesInTopology)
-		glog.Infof("  - Volume servers with volumes: %d (%v)", len(nodesWithVolumes), nodesWithVolumes)
-		glog.Infof("  - Volume servers without volumes: %d (%v)", len(nodesWithoutVolumes), nodesWithoutVolumes)
+		glog.Infof("Topology discovery: %d volume servers (%d with volumes, %d without)",
+			totalNodes, nodesWithVolumes, nodesWithoutVolumes)
 
-		// Store topology info for volume shard tracker
-		ms.lastTopologyInfo = resp.TopologyInfo
+		// Return topology info as a local value (not retained on the scanner struct)
+		topologyInfo = resp.TopologyInfo
 
 		return nil
 	})
 
 	if err != nil {
 		glog.Errorf("Failed to get volume health metrics: %v", err)
-		return nil, err
+		return nil, nil, err
 	}
 
 	glog.V(1).Infof("Successfully collected metrics for %d actual volumes with disk ID information", len(metrics))
@@ -176,13 +172,13 @@ func (ms *MaintenanceScanner) getVolumeHealthMetrics() ([]*VolumeHealthMetrics,
 	// Count actual replicas and identify EC volumes
 	ms.enrichVolumeMetrics(metrics)
 
-	return metrics, nil
+	return metrics, topologyInfo, nil
 }
 
 // enrichVolumeMetrics adds additional information like replica counts
-func (ms *MaintenanceScanner) enrichVolumeMetrics(metrics []*VolumeHealthMetrics) {
+func (ms *MaintenanceScanner) enrichVolumeMetrics(metrics []*types.VolumeHealthMetrics) {
 	// Group volumes by ID to count replicas
-	volumeGroups := make(map[uint32][]*VolumeHealthMetrics)
+	volumeGroups := make(map[uint32][]*types.VolumeHealthMetrics)
 	for _, metric := range metrics {
 		volumeGroups[metric.VolumeID] = append(volumeGroups[metric.VolumeID], metric)
 	}
@@ -193,41 +189,9 @@ func (ms *MaintenanceScanner) enrichVolumeMetrics(metrics []*VolumeHealthMetrics
 		for _, replica := range replicas {
 			replica.ReplicaCount = replicaCount
 		}
-		glog.V(3).Infof("Volume %d has %d replicas", volumeID, replicaCount)
+		glog.V(4).Infof("Volume %d has %d replicas", volumeID, replicaCount)
 	}
 
 	// TODO: Identify EC volumes by checking volume structure
 	// This would require querying volume servers for EC shard information
 }
-
-// convertToTaskMetrics converts existing volume metrics to task system format
-func (ms *MaintenanceScanner) convertToTaskMetrics(metrics []*VolumeHealthMetrics) []*types.VolumeHealthMetrics {
-	var simplified []*types.VolumeHealthMetrics
-
-	for _, metric := range metrics {
-		simplified = append(simplified, &types.VolumeHealthMetrics{
-			VolumeID:         metric.VolumeID,
-			Server:           metric.Server,
-			ServerAddress:    metric.ServerAddress,
-			DiskType:         metric.DiskType,
-			DiskId:           metric.DiskId,
-			DataCenter:       metric.DataCenter,
-			Rack:             metric.Rack,
-			Collection:       metric.Collection,
-			Size:             metric.Size,
-			DeletedBytes:     metric.DeletedBytes,
-			GarbageRatio:     metric.GarbageRatio,
-			LastModified:     metric.LastModified,
-			Age:              metric.Age,
-			ReplicaCount:     metric.ReplicaCount,
-			ExpectedReplicas: metric.ExpectedReplicas,
-			IsReadOnly:       metric.IsReadOnly,
-			HasRemoteCopy:    metric.HasRemoteCopy,
-			IsECVolume:       metric.IsECVolume,
-			FullnessRatio:    metric.FullnessRatio,
-		})
-	}
-
-	glog.V(2).Infof("Converted %d volume metrics with disk ID information for task detection", len(simplified))
-	return simplified
-}

weed/admin/maintenance/maintenance_types.go

@@ -130,6 +130,7 @@ type TaskPersistence interface {
 	LoadTaskState(taskID string) (*MaintenanceTask, error)
 	LoadAllTaskStates() ([]*MaintenanceTask, error)
 	DeleteTaskState(taskID string) error
+	DeleteAllTaskStates() error
 	CleanupCompletedTasks() error
 
 	// Policy persistence
@@ -211,7 +212,6 @@ type MaintenanceScanner struct {
 	queue       *MaintenanceQueue
 	lastScan    map[MaintenanceTaskType]time.Time
 	integration *MaintenanceIntegration
-	lastTopologyInfo *master_pb.TopologyInfo
 }
 
 // TaskDetectionResult represents the result of scanning for maintenance needs

weed/admin/topology/topology_management.go

@@ -87,7 +87,7 @@ func (at *ActiveTopology) UpdateTopology(topologyInfo *master_pb.TopologyInfo) e
 					}
 
 					diskKey := fmt.Sprintf("%s:%d", nodeInfo.Id, diskInfo.DiskId)
-					glog.V(2).Infof("UpdateTopology: adding disk key=%q nodeId=%q diskId=%d diskType=%q address=%q grpcPort=%d volumes=%d maxVolumes=%d",
+					glog.V(3).Infof("UpdateTopology: adding disk key=%q nodeId=%q diskId=%d diskType=%q address=%q grpcPort=%d volumes=%d maxVolumes=%d",
 						diskKey, nodeInfo.Id, diskInfo.DiskId, diskType, nodeInfo.Address, nodeInfo.GrpcPort, diskInfo.VolumeCount, diskInfo.MaxVolumeCount)
 					node.disks[diskInfo.DiskId] = disk
 					at.disks[diskKey] = disk