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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