diff --git a/other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java b/other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java
index 06c1bdd9f..5bf24ef68 100644
--- a/other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java
+++ b/other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java
@@ -45,6 +45,8 @@ public class SeaweedWrite {
 
         String etag = multipartUpload(targetUrl, auth, bytes, bytesOffset, bytesLength, cipherKey);
 
+        // TODO: cache fileId ~ bytes here
+
         entry.addChunks(FilerProto.FileChunk.newBuilder()
                 .setFileId(fileId)
                 .setOffset(offset)