zhijiangW edited a comment on issue #11453: [FLINK-13553][tests] Fix ByteBuf leak in KvStateServerHandlerTest URL: https://github.com/apache/flink/pull/11453#issuecomment-601594528 Thanks for the clarification. If I guess correctly, there are no limitations inside netty allocator to request memory unless direct OOM. That means even thought some requested `ByteBuf` leak, it would block any following allocation requests. Also the netty stack has some mechanism to check whether the requested `ByteBuf` is leaked. There is a similar case in https://issues.apache.org/jira/browse/FLINK-16582. I agree to launch a separate ticket for this leak fix. I have no other concerns now. LGTM!
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