diff --git a/internal/datanode/importv2/task_import.go b/internal/datanode/importv2/task_import.go
index 02e239061fb3e..f0216f3d0e1be 100644
--- a/internal/datanode/importv2/task_import.go
+++ b/internal/datanode/importv2/task_import.go
@@ -237,8 +237,8 @@ func (t *ImportTask) sync(hashedData HashedData) ([]*conc.Future[struct{}], []sy
 			}
 			future, err := t.syncMgr.SyncData(t.ctx, syncTask)
 			if err != nil {
-				log.Warn("sync data failed", WrapLogFields(t, zap.Error(err))...)
-				continue
+				log.Error("sync data failed", WrapLogFields(t, zap.Error(err))...)
+				return nil, nil, err
 			}
 			futures = append(futures, future)
 			syncTasks = append(syncTasks, syncTask)
diff --git a/internal/datanode/importv2/task_l0_import.go b/internal/datanode/importv2/task_l0_import.go
index 07d48337e9c2b..358b46b283aab 100644
--- a/internal/datanode/importv2/task_l0_import.go
+++ b/internal/datanode/importv2/task_l0_import.go
@@ -225,8 +225,8 @@ func (t *L0ImportTask) syncDelete(delData []*storage.DeleteData) ([]*conc.Future
 		}
 		future, err := t.syncMgr.SyncData(t.ctx, syncTask)
 		if err != nil {
-			log.Warn("failed to sync l0 delete data", WrapLogFields(t, zap.Error(err))...)
-			continue
+			log.Error("failed to sync l0 delete data", WrapLogFields(t, zap.Error(err))...)
+			return nil, nil, err
 		}
 		futures = append(futures, future)
 		syncTasks = append(syncTasks, syncTask)
diff --git a/internal/datanode/syncmgr/sync_manager.go b/internal/datanode/syncmgr/sync_manager.go
index 3c1896400fb1a..84915f4575797 100644
--- a/internal/datanode/syncmgr/sync_manager.go
+++ b/internal/datanode/syncmgr/sync_manager.go
@@ -47,6 +47,9 @@ type SyncMeta struct {
 type SyncManager interface {
 	// SyncData is the method to submit sync task.
 	SyncData(ctx context.Context, task Task, callbacks ...func(error) error) (*conc.Future[struct{}], error)
+
+	// Close waits for the task to finish and then shuts down the sync manager.
+	Close() error
 }
 
 type syncManager struct {
diff --git a/internal/datanode/syncmgr/sync_manager_test.go b/internal/datanode/syncmgr/sync_manager_test.go
index d2908b923e844..919ec39dad129 100644
--- a/internal/datanode/syncmgr/sync_manager_test.go
+++ b/internal/datanode/syncmgr/sync_manager_test.go
@@ -285,7 +285,8 @@ func (s *SyncManagerSuite) TestUnexpectedError() {
 	task.EXPECT().Run().Return(merr.WrapErrServiceInternal("mocked")).Once()
 	task.EXPECT().HandleError(mock.Anything)
 
-	f, _ := manager.SyncData(context.Background(), task)
+	f, err := manager.SyncData(context.Background(), task)
+	s.NoError(err)
 	_, err = f.Await()
 	s.Error(err)
 }
@@ -300,7 +301,9 @@ func (s *SyncManagerSuite) TestTargetUpdateSameID() {
 	task.EXPECT().Run().Return(errors.New("mock err")).Once()
 	task.EXPECT().HandleError(mock.Anything)
 
-	f, _ := manager.SyncData(context.Background(), task)
+	f, err := manager.SyncData(context.Background(), task)
+	s.NoError(err)
+
 	_, err = f.Await()
 	s.Error(err)
 }
diff --git a/internal/datanode/writebuffer/write_buffer.go b/internal/datanode/writebuffer/write_buffer.go
index 8352f5ad57f5d..2b22b6311f8ca 100644
--- a/internal/datanode/writebuffer/write_buffer.go
+++ b/internal/datanode/writebuffer/write_buffer.go
@@ -347,8 +347,7 @@ func (wb *writeBufferBase) syncSegments(ctx context.Context, segmentIDs []int64)
 			return nil
 		})
 		if err != nil {
-			log.Warn("failed to sync data", zap.Int64("segmentID", segmentID), zap.Error(err))
-			continue
+			log.Fatal("failed to sync data", zap.Int64("segmentID", segmentID), zap.Error(err))
 		}
 		result = append(result, future)
 	}
@@ -667,8 +666,7 @@ func (wb *writeBufferBase) Close(drop bool) {
 			return nil
 		})
 		if err != nil {
-			log.Warn("failed to sync segment", zap.Int64("segmentID", id), zap.Error(err))
-			continue
+			log.Fatal("failed to sync segment", zap.Int64("segmentID", id), zap.Error(err))
 		}
 		futures = append(futures, f)
 	}