[jira] [Created] (FLINK-7499) double buffer release in SpillableSubpartitionView

[Shang Yuanchun (Jira)]

Nico Kruber created FLINK-7499:
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             Summary: double buffer release in SpillableSubpartitionView
                 Key: FLINK-7499
                 URL: https://issues.apache.org/jira/browse/FLINK-7499
             Project: Flink
          Issue Type: Bug
          Components: Network
    Affects Versions: 1.3.2, 1.3.1, 1.2.1, 1.3.0, 1.1.4, 1.2.0, 1.1.5, 1.2.2, 1.4.0, 1.3.3
            Reporter: Nico Kruber
            Assignee: Nico Kruber


{{SpillableSubpartitionView#releaseMemory()}} recycles its buffers twice: once asynchronously after the write operation and once in {{SpillableSubpartitionView#releaseMemory()}} after adding the write operation to the queue.

1) if {{SpillableSubpartitionView#releaseMemory()}} hits first and the buffer is recycled, the memory region may already be reused despite the pending write
2) If, for some reason (probably only in tests like {{SpillableSubpartitionTest#testConsumeSpillablePartitionSpilledDuringConsume()}}?), the buffer is retained and to be used in parallel somewhere else it may also not be available anymore or contain corrupt data.



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