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https://issues.apache.org/jira/browse/FLINK-7804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16404077#comment-16404077
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ASF GitHub Bot commented on FLINK-7804:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/5675
> YarnResourceManager does not execute AMRMClientAsync callbacks in main thread
> -----------------------------------------------------------------------------
>
> Key: FLINK-7804
> URL: https://issues.apache.org/jira/browse/FLINK-7804
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination, YARN
> Affects Versions: 1.4.0, 1.5.0
> Reporter: Till Rohrmann
> Assignee: Gary Yao
> Priority: Blocker
> Labels: flip-6
> Fix For: 1.5.0
>
>
> The {{YarnResourceManager}} registers callbacks at a {{AMRMClientAsync}}
> which it uses to react to Yarn container allocations. These callbacks (e.g.
> {{onContainersAllocated}} modify the internal state of the
> {{YarnResourceManager}}. This can lead to race conditions with the
> {{requestYarnContainer}} method.
> In order to solve this problem we have to execute the state changing
> operations in the main thread of the {{YarnResourceManager}}.
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