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https://issues.apache.org/jira/browse/FLINK-21365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284628#comment-17284628
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Till Rohrmann commented on FLINK-21365:
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Nice :-) A short experiment also proved this point.
> Visibility issue in FutureUtils.ResultConjunctFuture.handleCompletedFuture
> ---------------------------------------------------------------------------
>
> Key: FLINK-21365
> URL: https://issues.apache.org/jira/browse/FLINK-21365
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.11.3, 1.12.1
> Reporter: Roman Khachatryan
> Assignee: Roman Khachatryan
> Priority: Major
> Fix For: 1.11.4, 1.12.2, 1.13.0
>
>
> * FutureUtils.ResultConjunctFuture.handleCompletedFuture can update *results*
> array from multiple threads
> * The array is declared as volatile but this only means the reference is
> volatile, not the contents
> * There are no other guards
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