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https://issues.apache.org/jira/browse/FLINK-12036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17219604#comment-17219604
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Robert Metzger commented on FLINK-12036:
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[~trohrmann] all the subtasks have been resolved. Can we close this ticket?
> Simplify ExecutionGraph by removing legacy concurrency code
> -----------------------------------------------------------
>
> Key: FLINK-12036
> URL: https://issues.apache.org/jira/browse/FLINK-12036
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.8.0
> Reporter: Till Rohrmann
> Priority: Major
>
> With FLINK-11417, we made the {{ExecutionGraph}} single threaded.
> Consequently all the logic which handles concurrent state changes is no
> longer needed (e.g. {{AtomicReferenceFieldUpdater}}, checking for concurrent
> changes, etc.). This issue is the umbrella to collect every legacy
> concurrency code which can be removed from the {{ExecutionGraph}}.
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