Update store.go (#6358)

Add lock for location.ecVolumes And single delete

weed/storage/store.go

@@ -381,19 +381,32 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 
 func (s *Store) deleteExpiredEcVolumes() (ecShards, deleted []*master_pb.VolumeEcShardInformationMessage) {
 	for _, location := range s.Locations {
+		// Collect ecVolume to be deleted
+		var toDeleteEvs []*erasure_coding.EcVolume
+		location.ecVolumesLock.RLock()
 		for _, ev := range location.ecVolumes {
-			messages := ev.ToVolumeEcShardInformationMessage()
 			if ev.IsTimeToDestroy() {
+				toDeleteEvs = append(toDeleteEvs, ev)
+			} else {
+				messages := ev.ToVolumeEcShardInformationMessage()
+				ecShards = append(ecShards, messages...)
+			}
+		}
+		location.ecVolumesLock.RUnlock()
+
+		// Delete expired volumes
+		for _, ev := range toDeleteEvs {
+			messages := ev.ToVolumeEcShardInformationMessage()
+			// deleteEcVolumeById has its own lock
 			err := location.deleteEcVolumeById(ev.VolumeId)
 			if err != nil {
 				ecShards = append(ecShards, messages...)
 				glog.Errorf("delete EcVolume err %d: %v", ev.VolumeId, err)
 				continue
 			}
+			// No need for additional lock here since we only need the messages
+			// from volumes that were already collected
 			deleted = append(deleted, messages...)
-			} else {
-				ecShards = append(ecShards, messages...)
-			}
 		}
 	}
 	return