diff --git a/other/java/client/src/main/proto/filer.proto b/other/java/client/src/main/proto/filer.proto
index 41c1650d4..6357d971f 100644
--- a/other/java/client/src/main/proto/filer.proto
+++ b/other/java/client/src/main/proto/filer.proto
@@ -127,6 +127,7 @@ message CreateEntryRequest {
 }
 
 message CreateEntryResponse {
+    string error = 1;
 }
 
 message UpdateEntryRequest {
diff --git a/weed/command/filer_copy.go b/weed/command/filer_copy.go
index f14d18c52..71143f307 100644
--- a/weed/command/filer_copy.go
+++ b/weed/command/filer_copy.go
@@ -331,7 +331,7 @@ func (worker *FileCopyWorker) uploadFileAsOne(ctx context.Context, task FileCopy
 			},
 		}
 
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			return fmt.Errorf("update fh: %v", err)
 		}
 		return nil
@@ -435,7 +435,7 @@ func (worker *FileCopyWorker) uploadFileInChunks(ctx context.Context, task FileC
 			},
 		}
 
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			return fmt.Errorf("update fh: %v", err)
 		}
 		return nil
diff --git a/weed/filesys/dir.go b/weed/filesys/dir.go
index 7af5544ff..fe6b30619 100644
--- a/weed/filesys/dir.go
+++ b/weed/filesys/dir.go
@@ -129,8 +129,7 @@ func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
 	glog.V(1).Infof("create: %v", req.String())
 
 	if err := dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
-		if _, err := client.CreateEntry(ctx, request); err != nil {
-			glog.V(0).Infof("create %s/%s: %v", dir.Path, req.Name, err)
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			if strings.Contains(err.Error(), "EEXIST") {
 				return fuse.EEXIST
 			}
@@ -174,7 +173,7 @@ func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, err
 		}
 
 		glog.V(1).Infof("mkdir: %v", request)
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.V(0).Infof("mkdir %s/%s: %v", dir.Path, req.Name, err)
 			return err
 		}
diff --git a/weed/filesys/dir_link.go b/weed/filesys/dir_link.go
index 8e60872d3..13be62670 100644
--- a/weed/filesys/dir_link.go
+++ b/weed/filesys/dir_link.go
@@ -36,7 +36,7 @@ func (dir *Dir) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node,
 	}
 
 	err := dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.V(0).Infof("symlink %s/%s: %v", dir.Path, req.NewName, err)
 			return fuse.EIO
 		}
diff --git a/weed/filesys/dirty_page_interval.go b/weed/filesys/dirty_page_interval.go
index 79b3af335..c64196cdf 100644
--- a/weed/filesys/dirty_page_interval.go
+++ b/weed/filesys/dirty_page_interval.go
@@ -31,12 +31,12 @@ func (list *IntervalLinkedList) Size() int64 {
 	return list.Tail.Offset + list.Tail.Size - list.Head.Offset
 }
 func (list *IntervalLinkedList) addNodeToTail(node *IntervalNode) {
-	// glog.V(0).Infof("add to tail [%d,%d) + [%d,%d) => [%d,%d)", list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, node.Offset+node.Size, list.Head.Offset, node.Offset+node.Size)
+	glog.V(4).Infof("add to tail [%d,%d) + [%d,%d) => [%d,%d)", list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, node.Offset+node.Size, list.Head.Offset, node.Offset+node.Size)
 	list.Tail.Next = node
 	list.Tail = node
 }
 func (list *IntervalLinkedList) addNodeToHead(node *IntervalNode) {
-	// glog.V(0).Infof("add to head [%d,%d) + [%d,%d) => [%d,%d)", node.Offset, node.Offset+node.Size, list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, list.Tail.Offset+list.Tail.Size)
+	glog.V(4).Infof("add to head [%d,%d) + [%d,%d) => [%d,%d)", node.Offset, node.Offset+node.Size, list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, list.Tail.Offset+list.Tail.Size)
 	node.Next = list.Head
 	list.Head = node
 }
@@ -102,7 +102,7 @@ func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) (hasOverlap
 	}
 
 	if prevList != nil && nextList != nil {
-		// glog.V(4).Infof("connecting [%d,%d) + [%d,%d) => [%d,%d)", prevList.Head.Offset, prevList.Tail.Offset+prevList.Tail.Size, nextList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size, prevList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size)
+		glog.V(4).Infof("connecting [%d,%d) + [%d,%d) => [%d,%d)", prevList.Head.Offset, prevList.Tail.Offset+prevList.Tail.Size, nextList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size, prevList.Head.Offset, nextList.Tail.Offset+nextList.Tail.Size)
 		prevList.Tail.Next = nextList.Head
 		prevList.Tail = nextList.Tail
 		c.removeList(nextList)
diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index 9fe4201db..fad5418e2 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -194,7 +194,7 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 		fh.f.entry.Chunks = chunks
 		// fh.f.entryViewCache = nil
 
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.Errorf("update fh: %v", err)
 			return fmt.Errorf("update fh: %v", err)
 		}
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index 41c1650d4..6357d971f 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -127,6 +127,7 @@ message CreateEntryRequest {
 }
 
 message CreateEntryResponse {
+    string error = 1;
 }
 
 message UpdateEntryRequest {
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index 043a46504..01b3e8d90 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -527,6 +527,7 @@ func (m *CreateEntryRequest) GetOExcl() bool {
 }
 
 type CreateEntryResponse struct {
+	Error string `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
 }
 
 func (m *CreateEntryResponse) Reset()                    { *m = CreateEntryResponse{} }
@@ -534,6 +535,13 @@ func (m *CreateEntryResponse) String() string            { return proto.CompactT
 func (*CreateEntryResponse) ProtoMessage()               {}
 func (*CreateEntryResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
 
+func (m *CreateEntryResponse) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
 type UpdateEntryRequest struct {
 	Directory string `protobuf:"bytes,1,opt,name=directory" json:"directory,omitempty"`
 	Entry     *Entry `protobuf:"bytes,2,opt,name=entry" json:"entry,omitempty"`
@@ -1465,107 +1473,108 @@ var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("filer.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 1624 bytes of a gzipped FileDescriptorProto
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+	0xd0, 0x68, 0x48, 0x46, 0x09, 0x73, 0xb5, 0x54, 0x58, 0xdf, 0x18, 0xb0, 0x7a, 0x09, 0x41, 0xea,
+	0x70, 0x1f, 0x9a, 0xa1, 0x1b, 0x73, 0xcc, 0xb2, 0x2e, 0xc9, 0xae, 0xd3, 0xa1, 0xa8, 0x5c, 0x17,
+	0x8a, 0x6a, 0x29, 0x14, 0x4b, 0xd0, 0x08, 0xdd, 0x0b, 0x27, 0x3c, 0x4e, 0x5f, 0x23, 0xf5, 0xd0,
+	0xbd, 0x78, 0x79, 0xbc, 0xfd, 0x4b, 0x13, 0x3a, 0x47, 0xd8, 0x3d, 0xc7, 0xd8, 0x97, 0x86, 0xa1,
+	0x51, 0xd6, 0x10, 0xc5, 0x6f, 0x3a, 0x74, 0x6f, 0xba, 0xf2, 0x67, 0x7e, 0x44, 0x0e, 0xee, 0x5f,
+	0x47, 0x96, 0xd6, 0xd6, 0x1c, 0x7a, 0x05, 0x6d, 0xed, 0xa3, 0x09, 0xad, 0x68, 0x8c, 0xa5, 0x6f,
+	0xc1, 0xc1, 0xea, 0x25, 0xd8, 0x4c, 0xda, 0x23, 0x03, 0x1d, 0x42, 0x5b, 0xdb, 0xf5, 0xba, 0xbc,
+	0xf2, 0xa3, 0x43, 0x97, 0x37, 0xe3, 0x81, 0x60, 0xcd, 0x09, 0x69, 0xda, 0xc6, 0xd6, 0xa5, 0x95,
+	0xdf, 0x08, 0xba, 0xb4, 0x59, 0x6b, 0x5e, 0x4a, 0xd3, 0x16, 0xa4, 0x2e, 0xad, 0xbc, 0xfe, 0x75,
+	0x69, 0xb3, 0xb6, 0xea, 0x1c, 0xfa, 0x1c, 0x16, 0x4a, 0xab, 0x0b, 0x59, 0x13, 0xae, 0xcb, 0x76,
+	0xee, 0x60, 0xe3, 0x4a, 0x9a, 0x5c, 0xfe, 0x6b, 0xe8, 0xe8, 0x2b, 0x05, 0x69, 0x06, 0xcd, 0x58,
+	0x8a, 0x83, 0xb5, 0xcb, 0xd0, 0xba, 0x40, 0x7d, 0x5a, 0xea, 0x02, 0x67, 0xec, 0x0b, 0x5d, 0xe0,
+	0xac, 0x21, 0x6b, 0xcd, 0xa1, 0xcf, 0x60, 0x7e, 0x7a, 0x6a, 0xa1, 0xbb, 0xd3, 0x61, 0x2b, 0x0d,
+	0xc3, 0x81, 0x75, 0x15, 0x49, 0x2e, 0xfc, 0x00, 0x60, 0x32, 0x8c, 0xd0, 0xf2, 0x84, 0xa7, 0x34,
+	0x0c, 0x07, 0x2b, 0xb3, 0x91, 0xb9, 0xa8, 0x2f, 0x60, 0x69, 0x66, 0xc7, 0x23, 0xad, 0x4d, 0xae,
+	0x9a, 0x19, 0x83, 0xbf, 0x5c, 0x4b, 0x97, 0xe9, 0x7a, 0xb1, 0x06, 0xf3, 0xb1, 0x6a, 0xe4, 0x61,
+	0xbc, 0xe5, 0x05, 0x04, 0x47, 0xfc, 0x05, 0x48, 0x8e, 0x37, 0x8c, 0x72, 0x7a, 0xdc, 0x90, 0xbf,
+	0x83, 0xfe, 0xfe, 0x7b, 0x00, 0x00, 0x00, 0xff, 0xff, 0xc5, 0xce, 0x15, 0x02, 0x1d, 0x12, 0x00,
+	0x00,
 }
diff --git a/weed/pb/filer_pb/filer_pb_helper.go b/weed/pb/filer_pb/filer_pb_helper.go
index 5c40332e6..b2ffacc01 100644
--- a/weed/pb/filer_pb/filer_pb_helper.go
+++ b/weed/pb/filer_pb/filer_pb_helper.go
@@ -1,6 +1,9 @@
 package filer_pb
 
 import (
+	"context"
+	"fmt"
+
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 )
 
@@ -67,3 +70,14 @@ func AfterEntryDeserialization(chunks []*FileChunk) {
 
 	}
 }
+
+func CreateEntry(ctx context.Context, client SeaweedFilerClient, request *CreateEntryRequest) error {
+	resp, err := client.CreateEntry(ctx, request)
+	if err == nil && resp.Error != "" {
+		return fmt.Errorf("CreateEntry: %v", resp.Error)
+	}
+	if err != nil {
+		return fmt.Errorf("CreateEntry: %v", err)
+	}
+	return err
+}
diff --git a/weed/replication/sink/filersink/filer_sink.go b/weed/replication/sink/filersink/filer_sink.go
index f99c7fdf6..58a3ab9c2 100644
--- a/weed/replication/sink/filersink/filer_sink.go
+++ b/weed/replication/sink/filersink/filer_sink.go
@@ -124,7 +124,7 @@ func (fs *FilerSink) CreateEntry(ctx context.Context, key string, entry *filer_p
 		}
 
 		glog.V(1).Infof("create: %v", request)
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.V(0).Infof("create entry %s: %v", key, err)
 			return fmt.Errorf("create entry %s: %v", key, err)
 		}
diff --git a/weed/s3api/filer_util.go b/weed/s3api/filer_util.go
index ed9612d35..2fceacd2a 100644
--- a/weed/s3api/filer_util.go
+++ b/weed/s3api/filer_util.go
@@ -37,7 +37,7 @@ func (s3a *S3ApiServer) mkdir(ctx context.Context, parentDirectoryPath string, d
 		}
 
 		glog.V(1).Infof("mkdir: %v", request)
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.V(0).Infof("mkdir %v: %v", request, err)
 			return fmt.Errorf("mkdir %s/%s: %v", parentDirectoryPath, dirName, err)
 		}
@@ -68,7 +68,7 @@ func (s3a *S3ApiServer) mkFile(ctx context.Context, parentDirectoryPath string,
 		}
 
 		glog.V(1).Infof("create file: %s/%s", parentDirectoryPath, fileName)
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			glog.V(0).Infof("create file %v:%v", request, err)
 			return fmt.Errorf("create file %s/%s: %v", parentDirectoryPath, fileName, err)
 		}
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index 5145035d2..03954a58c 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -132,27 +132,31 @@ func (fs *FilerServer) LookupVolume(ctx context.Context, req *filer_pb.LookupVol
 
 func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntryRequest) (resp *filer_pb.CreateEntryResponse, err error) {
 
+	resp = &filer_pb.CreateEntryResponse{}
+
 	fullpath := filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Entry.Name)))
 	chunks, garbages := filer2.CompactFileChunks(req.Entry.Chunks)
 
 	if req.Entry.Attributes == nil {
 		glog.V(3).Infof("CreateEntry %s: nil attributes", filepath.Join(req.Directory, req.Entry.Name))
-		return nil, fmt.Errorf("can not create entry with empty attributes")
+		resp.Error = fmt.Sprintf("can not create entry with empty attributes")
+		return
 	}
 
-	err = fs.filer.CreateEntry(ctx, &filer2.Entry{
+	createErr := fs.filer.CreateEntry(ctx, &filer2.Entry{
 		FullPath: fullpath,
 		Attr:     filer2.PbToEntryAttribute(req.Entry.Attributes),
 		Chunks:   chunks,
 	}, req.OExcl)
 
-	if err == nil {
+	if createErr == nil {
 		fs.filer.DeleteChunks(garbages)
 	} else {
-		glog.V(3).Infof("CreateEntry %s: %v", filepath.Join(req.Directory, req.Entry.Name), err)
+		glog.V(3).Infof("CreateEntry %s: %v", filepath.Join(req.Directory, req.Entry.Name), createErr)
+		resp.Error = createErr.Error()
 	}
 
-	return &filer_pb.CreateEntryResponse{}, err
+	return
 }
 
 func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntryRequest) (*filer_pb.UpdateEntryResponse, error) {
diff --git a/weed/server/webdav_server.go b/weed/server/webdav_server.go
index 17f814302..875cc2999 100644
--- a/weed/server/webdav_server.go
+++ b/weed/server/webdav_server.go
@@ -155,7 +155,7 @@ func (fs *WebDavFileSystem) Mkdir(ctx context.Context, fullDirPath string, perm
 		}
 
 		glog.V(1).Infof("mkdir: %v", request)
-		if _, err := client.CreateEntry(ctx, request); err != nil {
+		if err := filer_pb.CreateEntry(ctx, client, request); err != nil {
 			return fmt.Errorf("mkdir %s/%s: %v", dir, name, err)
 		}
 
@@ -187,7 +187,7 @@ func (fs *WebDavFileSystem) OpenFile(ctx context.Context, fullFilePath string, f
 
 		dir, name := filer2.FullPath(fullFilePath).DirAndName()
 		err = fs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
-			if _, err := client.CreateEntry(ctx, &filer_pb.CreateEntryRequest{
+			if err := filer_pb.CreateEntry(ctx, client, &filer_pb.CreateEntryRequest{
 				Directory: dir,
 				Entry: &filer_pb.Entry{
 					Name:        name,
diff --git a/weed/shell/command_fs_meta_load.go b/weed/shell/command_fs_meta_load.go
index 5ea8de9f5..52dd0321b 100644
--- a/weed/shell/command_fs_meta_load.go
+++ b/weed/shell/command_fs_meta_load.go
@@ -80,7 +80,7 @@ func (c *commandFsMetaLoad) Do(args []string, commandEnv *CommandEnv, writer io.
 				return err
 			}
 
-			if _, err = client.CreateEntry(ctx, &filer_pb.CreateEntryRequest{
+			if err := filer_pb.CreateEntry(ctx, client, &filer_pb.CreateEntryRequest{
 				Directory: fullEntry.Dir,
 				Entry:     fullEntry.Entry,
 			}); err != nil {