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https://issues.apache.org/jira/browse/YARN-4325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284751#comment-15284751
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Junping Du commented on YARN-4325:
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Thanks [~jlowe] for review and commit!
> Nodemanager log handlers fail to send finished/failed events in some cases
> --------------------------------------------------------------------------
>
> Key: YARN-4325
> URL: https://issues.apache.org/jira/browse/YARN-4325
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Junping Du
> Assignee: Junping Du
> Priority: Critical
> Fix For: 2.8.0
>
> Attachments: ApplicationImpl.PNG, YARN-4325-v1.1.patch,
> YARN-4325-v1.patch, YARN-4325-v2.patch, YARN-4325-v3.1.patch,
> YARN-4325-v3.patch, YARN-4325-v4.1.patch, YARN-4325-v4.patch, YARN-4325.patch
>
>
> From a long running cluster, we found tens of thousands of stale apps still
> be recovered in NM restart recovery.
> After investigating, there are three issues cause app state leak in NM
> state-store:
> 1. APPLICATION_LOG_HANDLING_FAILED is not handled with remove App in
> NMStateStore.
> 2. APPLICATION_LOG_HANDLING_FAILED event is missing in sent when hit
> aggregator's doAppLogAggregation() exception case.
> 3. Only Application in FINISHED status receiving APPLICATION_LOG_FINISHED has
> transition to remove app in NM state store. Application in other status -
> like APPLICATION_RESOURCES_CLEANUP will ignore the event and later forget to
> remove this app from NM state store even after app get finished.
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