diff --git a/weed/filer2/abstract_sql/abstract_sql_store.go b/weed/filer2/abstract_sql/abstract_sql_store.go
index 47fe507a1..864c858d3 100644
--- a/weed/filer2/abstract_sql/abstract_sql_store.go
+++ b/weed/filer2/abstract_sql/abstract_sql_store.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -104,7 +105,7 @@ func (store *AbstractSqlStore) FindEntry(ctx context.Context, fullpath filer2.Fu
 	row := store.getTxOrDB(ctx).QueryRowContext(ctx, store.SqlFind, util.HashStringToLong(dir), name, dir)
 	var data []byte
 	if err := row.Scan(&data); err != nil {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 
 	entry := &filer2.Entry{
diff --git a/weed/filer2/cassandra/cassandra_store.go b/weed/filer2/cassandra/cassandra_store.go
index f81ef946f..6f25fffec 100644
--- a/weed/filer2/cassandra/cassandra_store.go
+++ b/weed/filer2/cassandra/cassandra_store.go
@@ -3,10 +3,13 @@ package cassandra
 import (
 	"context"
 	"fmt"
+
+	"github.com/gocql/gocql"
+
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/gocql/gocql"
 )
 
 func init() {
@@ -80,12 +83,12 @@ func (store *CassandraStore) FindEntry(ctx context.Context, fullpath filer2.Full
 		"SELECT meta FROM filemeta WHERE directory=? AND name=?",
 		dir, name).Consistency(gocql.One).Scan(&data); err != nil {
 		if err != gocql.ErrNotFound {
-			return nil, filer2.ErrNotFound
+			return nil, filer_pb.ErrNotFound
 		}
 	}
 
 	if len(data) == 0 {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 
 	entry = &filer2.Entry{
diff --git a/weed/filer2/etcd/etcd_store.go b/weed/filer2/etcd/etcd_store.go
index 0f0c01426..83a6ddc5d 100644
--- a/weed/filer2/etcd/etcd_store.go
+++ b/weed/filer2/etcd/etcd_store.go
@@ -6,10 +6,12 @@ import (
 	"strings"
 	"time"
 
+	"go.etcd.io/etcd/clientv3"
+
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	weed_util "github.com/chrislusf/seaweedfs/weed/util"
-	"go.etcd.io/etcd/clientv3"
 )
 
 const (
@@ -99,7 +101,7 @@ func (store *EtcdStore) FindEntry(ctx context.Context, fullpath filer2.FullPath)
 	}
 
 	if len(resp.Kvs) == 0 {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 
 	entry = &filer2.Entry{
diff --git a/weed/filer2/filer.go b/weed/filer2/filer.go
index cbb14a5c1..0b6a5c96e 100644
--- a/weed/filer2/filer.go
+++ b/weed/filer2/filer.go
@@ -13,6 +13,7 @@ import (
 	"github.com/karlseguin/ccache"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
 )
@@ -126,7 +127,7 @@ func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool) erro
 			glog.V(2).Infof("create directory: %s %v", dirPath, dirEntry.Mode)
 			mkdirErr := f.store.InsertEntry(ctx, dirEntry)
 			if mkdirErr != nil {
-				if _, err := f.FindEntry(ctx, FullPath(dirPath)); err == ErrNotFound {
+				if _, err := f.FindEntry(ctx, FullPath(dirPath)); err == filer_pb.ErrNotFound {
 					glog.V(3).Infof("mkdir %s: %v", dirPath, mkdirErr)
 					return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
 				}
diff --git a/weed/filer2/filer_client_util.go b/weed/filer2/filer_client_util.go
index 04da240b6..98bb57779 100644
--- a/weed/filer2/filer_client_util.go
+++ b/weed/filer2/filer_client_util.go
@@ -104,7 +104,7 @@ func GetEntry(filerClient FilerClient, fullFilePath FullPath) (entry *filer_pb.E
 		// glog.V(3).Infof("read %s request: %v", fullFilePath, request)
 		resp, err := filer_pb.LookupEntry(client, request)
 		if err != nil {
-			if err == ErrNotFound {
+			if err == filer_pb.ErrNotFound {
 				return nil
 			}
 			glog.V(3).Infof("read %s %v: %v", fullFilePath, resp, err)
diff --git a/weed/filer2/filerstore.go b/weed/filer2/filerstore.go
index ae25534ed..f724f79c2 100644
--- a/weed/filer2/filerstore.go
+++ b/weed/filer2/filerstore.go
@@ -2,7 +2,6 @@ package filer2
 
 import (
 	"context"
-	"errors"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
@@ -28,8 +27,6 @@ type FilerStore interface {
 	RollbackTransaction(ctx context.Context) error
 }
 
-var ErrNotFound = errors.New("filer: no entry is found in filer store")
-
 type FilerStoreWrapper struct {
 	actualStore FilerStore
 }
diff --git a/weed/filer2/leveldb/leveldb_store.go b/weed/filer2/leveldb/leveldb_store.go
index 44e6ac0eb..807fcb56f 100644
--- a/weed/filer2/leveldb/leveldb_store.go
+++ b/weed/filer2/leveldb/leveldb_store.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -94,7 +95,7 @@ func (store *LevelDBStore) FindEntry(ctx context.Context, fullpath filer2.FullPa
 	data, err := store.db.Get(key, nil)
 
 	if err == leveldb.ErrNotFound {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 	if err != nil {
 		return nil, fmt.Errorf("get %s : %v", entry.FullPath, err)
diff --git a/weed/filer2/leveldb2/leveldb2_store.go b/weed/filer2/leveldb2/leveldb2_store.go
index 358d4d92a..0b07c6833 100644
--- a/weed/filer2/leveldb2/leveldb2_store.go
+++ b/weed/filer2/leveldb2/leveldb2_store.go
@@ -14,6 +14,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -104,7 +105,7 @@ func (store *LevelDB2Store) FindEntry(ctx context.Context, fullpath filer2.FullP
 	data, err := store.dbs[partitionId].Get(key, nil)
 
 	if err == leveldb.ErrNotFound {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 	if err != nil {
 		return nil, fmt.Errorf("get %s : %v", entry.FullPath, err)
diff --git a/weed/filer2/redis/universal_redis_store.go b/weed/filer2/redis/universal_redis_store.go
index 2162be733..c5b9d9416 100644
--- a/weed/filer2/redis/universal_redis_store.go
+++ b/weed/filer2/redis/universal_redis_store.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 const (
@@ -64,7 +65,7 @@ func (store *UniversalRedisStore) FindEntry(ctx context.Context, fullpath filer2
 
 	data, err := store.Client.Get(string(fullpath)).Result()
 	if err == redis.Nil {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 
 	if err != nil {
diff --git a/weed/filer2/tikv/tikv_store.go b/weed/filer2/tikv/tikv_store.go
index 24e05e3ad..accd4f169 100644
--- a/weed/filer2/tikv/tikv_store.go
+++ b/weed/filer2/tikv/tikv_store.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 
 	"github.com/pingcap/tidb/kv"
@@ -110,7 +111,7 @@ func (store *TikvStore) FindEntry(ctx context.Context, fullpath filer2.FullPath)
 	data, err := store.getTx(ctx).Get(ctx, key)
 
 	if err == kv.ErrNotExist {
-		return nil, filer2.ErrNotFound
+		return nil, filer_pb.ErrNotFound
 	}
 	if err != nil {
 		return nil, fmt.Errorf("get %s : %v", entry.FullPath, err)
diff --git a/weed/filesys/xattr.go b/weed/filesys/xattr.go
index 993e7ad93..af154a7ee 100644
--- a/weed/filesys/xattr.go
+++ b/weed/filesys/xattr.go
@@ -123,7 +123,7 @@ func (wfs *WFS) maybeLoadEntry(dir, name string) (entry *filer_pb.Entry, err err
 
 		resp, err := filer_pb.LookupEntry(client, request)
 		if err != nil {
-			if err == filer2.ErrNotFound {
+			if err == filer_pb.ErrNotFound {
 				glog.V(3).Infof("file attr read not found file %v: %v", request, err)
 				return fuse.ENOENT
 			}
diff --git a/weed/pb/filer_pb/filer_pb_helper.go b/weed/pb/filer_pb/filer_pb_helper.go
index b69a83354..96ab2154f 100644
--- a/weed/pb/filer_pb/filer_pb_helper.go
+++ b/weed/pb/filer_pb/filer_pb_helper.go
@@ -2,10 +2,10 @@ package filer_pb
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strings"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 )
@@ -88,23 +88,18 @@ func CreateEntry(client SeaweedFilerClient, request *CreateEntryRequest) error {
 }
 
 func LookupEntry(client SeaweedFilerClient, request *LookupDirectoryEntryRequest) (*LookupDirectoryEntryResponse, error) {
-	resp, err := filer_pb.LookupEntry(client, request)
+	resp, err := client.LookupDirectoryEntry(context.Background(), request)
 	if err != nil {
-		if err == filer2.ErrNotFound || strings.Contains(err.Error(), ErrNotFound.Error()) {
-			return nil, filer2.ErrNotFound
+		if err == ErrNotFound || strings.Contains(err.Error(), ErrNotFound.Error()) {
+			return nil, ErrNotFound
 		}
-		glog.V(3).Infof("read %s/%v: %v", request.Directory, request.Entry.Name, err)
+		glog.V(3).Infof("read %s/%v: %v", request.Directory, request.Name, err)
 		return nil, fmt.Errorf("LookupEntry1: %v", err)
 	}
-	if resp.Error != "" && strings.Contains(resp.Error, ErrNotFound.Error()) {
-		return nil, filer2.ErrNotFound
-	}
-	if resp.Error != "" {
-		glog.V(3).Infof("lookup %s/%v: %v", request.Directory, request.Entry.Name, err)
-		return nil, fmt.Errorf("LookupEntry2: %v", err)
-	}
 	if resp.Entry == nil {
-		return nil, filer2.ErrNotFound
+		return nil, ErrNotFound
 	}
 	return resp, nil
 }
+
+var ErrNotFound = errors.New("filer: no entry is found in filer store")
diff --git a/weed/s3api/filer_util.go b/weed/s3api/filer_util.go
index d43ca8e5d..ec1eedcb4 100644
--- a/weed/s3api/filer_util.go
+++ b/weed/s3api/filer_util.go
@@ -8,7 +8,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
@@ -205,7 +204,7 @@ func (s3a *S3ApiServer) exists(parentDirectoryPath string, entryName string, isD
 		glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
 		resp, err := filer_pb.LookupEntry(client, request)
 		if err != nil {
-			if err == filer2.ErrNotFound {
+			if err == filer_pb.ErrNotFound {
 				exists = false
 				return nil
 			}
diff --git a/weed/s3api/s3api_bucket_handlers.go b/weed/s3api/s3api_bucket_handlers.go
index c165ae2c4..3e5089bed 100644
--- a/weed/s3api/s3api_bucket_handlers.go
+++ b/weed/s3api/s3api_bucket_handlers.go
@@ -13,7 +13,6 @@ import (
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/gorilla/mux"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
@@ -119,8 +118,8 @@ func (s3a *S3ApiServer) HeadBucketHandler(w http.ResponseWriter, r *http.Request
 
 		glog.V(1).Infof("lookup bucket: %v", request)
 		if _, err := filer_pb.LookupEntry(client, request); err != nil {
-			if err == filer2.ErrNotFound {
-				return filer2.ErrNotFound
+			if err == filer_pb.ErrNotFound {
+				return filer_pb.ErrNotFound
 			}
 			return fmt.Errorf("lookup bucket %s/%s: %v", s3a.option.BucketsPath, bucket, err)
 		}
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index b000bf3a6..b904c1393 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -19,7 +19,7 @@ import (
 func (fs *FilerServer) LookupDirectoryEntry(ctx context.Context, req *filer_pb.LookupDirectoryEntryRequest) (*filer_pb.LookupDirectoryEntryResponse, error) {
 
 	entry, err := fs.filer.FindEntry(ctx, filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Name))))
-	if err == filer2.ErrNotFound {
+	if err == filer_pb.ErrNotFound {
 		return &filer_pb.LookupDirectoryEntryResponse{}, nil
 	}
 	if err != nil {
diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index ca687ca5d..1864a26d1 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -15,6 +15,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -33,7 +34,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 			fs.listDirectoryHandler(w, r)
 			return
 		}
-		if err == filer2.ErrNotFound {
+		if err == filer_pb.ErrNotFound {
 			glog.V(1).Infof("Not found %s: %v", path, err)
 			stats.FilerRequestCounter.WithLabelValues("read.notfound").Inc()
 			w.WriteHeader(http.StatusNotFound)
diff --git a/weed/server/filer_server_handlers_write.go b/weed/server/filer_server_handlers_write.go
index 01f46a53b..be6bb40f2 100644
--- a/weed/server/filer_server_handlers_write.go
+++ b/weed/server/filer_server_handlers_write.go
@@ -307,7 +307,7 @@ func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		glog.V(1).Infoln("deleting", r.URL.Path, ":", err.Error())
 		httpStatus := http.StatusInternalServerError
-		if err == filer2.ErrNotFound {
+		if err == filer_pb.ErrNotFound {
 			httpStatus = http.StatusNotFound
 		}
 		writeJsonError(w, r, httpStatus, err)
diff --git a/weed/shell/command_fs_meta_cat.go b/weed/shell/command_fs_meta_cat.go
index 52e2ee6c0..cd1ffb6fd 100644
--- a/weed/shell/command_fs_meta_cat.go
+++ b/weed/shell/command_fs_meta_cat.go
@@ -1,7 +1,6 @@
 package shell
 
 import (
-	"context"
 	"fmt"
 	"io"
 
diff --git a/weed/shell/commands.go b/weed/shell/commands.go
index 2239fa435..b8832ad93 100644
--- a/weed/shell/commands.go
+++ b/weed/shell/commands.go
@@ -1,7 +1,6 @@
 package shell
 
 import (
-	"context"
 	"fmt"
 	"io"
 	"net/url"