diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index 6aa8d50ff..ffa24a0d8 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -1,15 +1,16 @@
 package weed_server
 
 import (
+	"fmt"
 	"context"
+	"time"
+	"os"
+	"path/filepath"
+
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
-	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
-	"path/filepath"
 	"github.com/chrislusf/seaweedfs/weed/glog"
-	"time"
-	"os"
 )
 
 func (fs *FilerServer) LookupDirectoryEntry(ctx context.Context, req *filer_pb.LookupDirectoryEntryRequest) (*filer_pb.LookupDirectoryEntryResponse, error) {