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https://issues.apache.org/jira/browse/FLINK-14602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968166#comment-16968166
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Gary Yao commented on FLINK-14602:
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I assigned the ticket to you, [~yanghua]
> Degenerate the current ConcurrentHashMap type of tasks to a normal HashMap
> type.
> --------------------------------------------------------------------------------
>
> Key: FLINK-14602
> URL: https://issues.apache.org/jira/browse/FLINK-14602
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Coordination
> Reporter: vinoyang
> Assignee: vinoyang
> Priority: Major
>
> After FLINK-11417, we made ExecutionGraph be a single-thread mode. It will no
> longer be plagued by concurrency issues. So, we can degenerate the current
> ConcurrentHashMap type of tasks to a normal HashMap type.
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