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https://issues.apache.org/jira/browse/YARN-7952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16399973#comment-16399973
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Xuan Gong commented on YARN-7952:
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findbug warning and testcase failure are not related
> RM should be able to recover log aggregation status after restart/fail-over
> ---------------------------------------------------------------------------
>
> Key: YARN-7952
> URL: https://issues.apache.org/jira/browse/YARN-7952
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Xuan Gong
> Assignee: Xuan Gong
> Priority: Major
> Attachments: YARN-7952-poc.patch, YARN-7952.1.patch,
> YARN-7952.2.patch, YARN-7952.3.patch, YARN-7952.3.patch, YARN-7952.5.patch,
> YARN-7952.6.patch, YARN-7952.7.patch, YARN-7952.8.patch, YARN-7952.9.patch
>
>
> Right now, the NM would send its own log aggregation status to RM
> periodically to RM. And RM would aggregate the status for each application,
> but it will not generate the final status until a client call(from web ui or
> cli) trigger it. But RM never persists the log aggregation status. So, when
> RM restarts/fails over, the log aggregation status will become “NOT_STARTED”.
> This is confusing, maybe we should change it to “NOT_AVAILABLE” (will create
> a separate ticket for this). Anyway, we need to persist the log aggregation
> status for the future use.
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