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https://issues.apache.org/jira/browse/YARN-3995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14647017#comment-14647017
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Naganarasimha G R commented on YARN-3995:
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Two approaches were discussed till now :
# we can have timer task which periodically cleans up collector after some
period and not imm remove it when AM container is finished.
# When RM finishes the attempt then it can send one finish event through
timelineclient for the ApplicationEntity which is kind of a marker based on
which NM's TimelineCollectorManager can act upon.
> Some of the NM events are not getting published due race condition when AM
> container finishes in NM
> ----------------------------------------------------------------------------------------------------
>
> Key: YARN-3995
> URL: https://issues.apache.org/jira/browse/YARN-3995
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager, timelineserver
> Affects Versions: YARN-2928
> Reporter: Naganarasimha G R
> Assignee: Naganarasimha G R
>
> As discussed in YARN-3045: While testing in TestDistributedShell found out
> that few of the container metrics events were failing as there will be race
> condition. When the AM container finishes and removes the collector for the
> app, still there is possibility that all the events published for the app by
> the current NM and other NM are still in pipeline,
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