GJL commented on issue #11453: [FLINK-13553][tests] Fix ByteBuf leak in KvStateServerHandlerTest URL: https://github.com/apache/flink/pull/11453#issuecomment-601579753 > But I noticed the description of FLINK-13553 for TimeoutException, so i am curious that the memory leak would cause the timeout issue? I don't know if this patch will fix all problems of FLINK-13553. However, one of the problems now is that we may not be able to allocate a new buffer to serialize the response: https://github.com/apache/flink/blob/0619a5b3e000855f00d11e71ae2f1b9deef05c98/flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/network/AbstractServerHandler.java#L248 If that happens the error is swallowed in `AbstractServerHandler`, and the test code will wait in vain for the response until a timeout is reached: https://github.com/apache/flink/blob/0619a5b3e000855f00d11e71ae2f1b9deef05c98/flink-queryable-state/flink-queryable-state-runtime/src/test/java/org/apache/flink/queryablestate/network/KvStateServerHandlerTest.java#L720 I'll create a new ticket and leave FLINK-13553 open for now.
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