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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5642) queryable state: race condition with HeadListState
Date Fri, 10 Mar 2017 11:47:05 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904952#comment-15904952

ASF GitHub Bot commented on FLINK-5642:

Github user NicoK commented on the issue:

    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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