wsry commented on a change in pull request #11877: URL: https://github.com/apache/flink/pull/11877#discussion_r661986812
########## File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/CreditBasedPartitionRequestClientHandler.java ########## @@ -340,7 +355,15 @@ private void decodeBufferOrEvent( RemoteInputChannel inputChannel, NettyMessage.BufferResponse bufferOrEvent) throws Throwable { if (bufferOrEvent.isBuffer() && bufferOrEvent.bufferSize == 0) { - inputChannel.onEmptyBuffer(bufferOrEvent.sequenceNumber, bufferOrEvent.backlog); + try { + inputChannel.onEmptyBuffer(bufferOrEvent.sequenceNumber, bufferOrEvent.backlog); + } finally { + // recycle the empty buffer directly + Buffer buffer = bufferOrEvent.getBuffer(); + if (buffer != null) { + buffer.recycleBuffer(); Review comment: It is not a bug. The empty buffer will not be sent to the downstream before. However, after this change, the empty buffer will be sent to the downstream task to release the credit already allocated for it. If we do not send the empty buffer to the downstream, the corresponding downstream channel will occupy more credits than needed. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org