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https://issues.apache.org/jira/browse/FLINK-5642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904952#comment-15904952
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ASF GitHub Bot commented on FLINK-5642:
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Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/3218
ok, let's close this PR as the issue is actually deeper than originally
though and can only be fixed with a new heap state backend or by locking for
queryable state queries as well
> queryable state: race condition with HeadListState
> --------------------------------------------------
>
> Key: FLINK-5642
> URL: https://issues.apache.org/jira/browse/FLINK-5642
> Project: Flink
> Issue Type: Bug
> Components: Queryable State
> Affects Versions: 1.2.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
>
> If queryable state accesses a HeapListState instance that is being modified
> during the value's serialisation, it may crash, e.g. with a
> NullPointerException during the serialisation or with an EOFException during
> de-serialisation.
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