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Posted to issues@flink.apache.org by "Nico Kruber (JIRA)" <ji...@apache.org> on 2018/01/10 09:56:00 UTC
[jira] [Reopened] (FLINK-7499) double buffer release in
SpillableSubpartitionView
[ https://issues.apache.org/jira/browse/FLINK-7499?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nico Kruber reopened FLINK-7499:
--------------------------------
re-open to fix in 1.4 as well
> double buffer release in SpillableSubpartitionView
> --------------------------------------------------
>
> Key: FLINK-7499
> URL: https://issues.apache.org/jira/browse/FLINK-7499
> Project: Flink
> Issue Type: Sub-task
> Components: Network
> Affects Versions: 1.2.0, 1.1.4, 1.3.0, 1.1.5, 1.2.1, 1.2.2, 1.3.1, 1.4.0, 1.3.2, 1.3.3
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Blocker
> Fix For: 1.5.0
>
>
> {{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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