retry both assign volume and uploading data

fix https://github.com/chrislusf/seaweedfs/issues/2351

weed/command/filer_copy.go

@@ -344,9 +344,9 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 			return err
 		}
 
-		// assign a volume
-		err = util.Retry("assignVolume", func() error {
-			return pb.WithGrpcFilerClient(worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		err = util.Retry("upload", func() error {
+			// assign a volume
+			assignErr := pb.WithGrpcFilerClient(worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 
 				request := &filer_pb.AssignVolumeRequest{
 					Count:       1,
@@ -369,35 +369,41 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 				}
 				return nil
 			})
-		})
-		if err != nil {
-			return fmt.Errorf("Failed to assign from %v: %v\n", worker.options.masters, err)
-		}
+			if assignErr != nil {
+				return assignErr
+			}
 
-		targetUrl := "http://" + assignResult.Location.Url + "/" + assignResult.FileId
-		uploadOption := &operation.UploadOption{
-			UploadUrl:         targetUrl,
-			Filename:          fileName,
-			Cipher:            worker.options.cipher,
-			IsInputCompressed: false,
-			MimeType:          mimeType,
-			PairMap:           nil,
-			Jwt:               security.EncodedJwt(assignResult.Auth),
-		}
-		uploadResult, err := operation.UploadData(data, uploadOption)
+			// uplaod data
+			targetUrl := "http://" + assignResult.Location.Url + "/" + assignResult.FileId
+			uploadOption := &operation.UploadOption{
+				UploadUrl:         targetUrl,
+				Filename:          fileName,
+				Cipher:            worker.options.cipher,
+				IsInputCompressed: false,
+				MimeType:          mimeType,
+				PairMap:           nil,
+				Jwt:               security.EncodedJwt(assignResult.Auth),
+			}
+			uploadResult, err := operation.UploadData(data, uploadOption)
+			if err != nil {
+				return fmt.Errorf("upload data %v to %s: %v\n", fileName, targetUrl, err)
+			}
+			if uploadResult.Error != "" {
+				return fmt.Errorf("upload %v to %s result: %v\n", fileName, targetUrl, uploadResult.Error)
+			}
+			if *worker.options.verbose {
+				fmt.Printf("uploaded %s to %s\n", fileName, targetUrl)
+			}
+
+			fmt.Printf("copied %s => http://%s%s%s\n", f.Name(), worker.filerAddress.ToHttpAddress(), task.destinationUrlPath, fileName)
+			chunks = append(chunks, uploadResult.ToPbFileChunk(assignResult.FileId, 0))
+
+			return nil
+		})
 		if err != nil {
-			return fmt.Errorf("upload data %v to %s: %v\n", fileName, targetUrl, err)
-		}
-		if uploadResult.Error != "" {
-			return fmt.Errorf("upload %v to %s result: %v\n", fileName, targetUrl, uploadResult.Error)
+			return fmt.Errorf("upload %v: %v\n", fileName, err)
 		}
-		if *worker.options.verbose {
-			fmt.Printf("uploaded %s to %s\n", fileName, targetUrl)
-		}
-
-		chunks = append(chunks, uploadResult.ToPbFileChunk(assignResult.FileId, 0))
 
-		fmt.Printf("copied %s => http://%s%s%s\n", f.Name(), worker.filerAddress.ToHttpAddress(), task.destinationUrlPath, fileName)
 	}
 
 	if err := pb.WithGrpcFilerClient(worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {