liucyu opened a new issue #1360: NettyRemotingAbstract#invokeSyncImpl countdown.await block URL: https://github.com/apache/rocketmq/issues/1360 In the `NettyRemotingAbstract` class the method `invokeSyncImpl`'s code `RemotingCommand responseCommand = responseFuture.waitResponse(timeoutMillis);` Will cause a bug that the thread pool cannot invoke countdown due to some reason, it will block a long time. And the bug can solve just add a `releaseResponse` method in `responseFuture` because you can invoke it during scheduled task invoke `ResponseFuture.isTimeout` method
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