unlock before submitting the uploading jobs

weed/mount/page_writer/upload_pipeline.go

@@ -73,8 +73,9 @@ func (up *UploadPipeline) SaveDataAt(p []byte, off int64, isSequential bool) (n
 					fullness = chunkFullness
 				}
 			}
-			up.moveToSealed(up.writableChunks[fullestChunkIndex], fullestChunkIndex)
+			fullWritableChunk := up.writableChunks[fullestChunkIndex]
 			delete(up.writableChunks, fullestChunkIndex)
+			up.moveToSealed(fullWritableChunk, fullestChunkIndex)
 			// fmt.Printf("flush chunk %d with %d bytes written\n", logicChunkIndex, fullness)
 		}
 		if isSequential &&
@@ -155,6 +156,8 @@ func (up *UploadPipeline) moveToSealed(memChunk PageChunk, logicChunkIndex Logic
 	up.sealedChunks[logicChunkIndex] = sealedChunk
 	delete(up.writableChunks, logicChunkIndex)
 
+	// unlock before submitting the uploading jobs
+	up.chunksLock.Unlock()
 	up.uploaders.Execute(func() {
 		// first add to the file chunks
 		sealedChunk.chunk.SaveContent(up.saveToStorageFn)
@@ -181,6 +184,7 @@ func (up *UploadPipeline) moveToSealed(memChunk PageChunk, logicChunkIndex Logic
 		sealedChunk.FreeReference(fmt.Sprintf("%s finished uploading chunk %d", up.filepath, logicChunkIndex))
 
 	})
+	up.chunksLock.Lock()
 }
 
 func (up *UploadPipeline) Shutdown() {