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https://issues.apache.org/jira/browse/YARN-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14138083#comment-14138083
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Jian He commented on YARN-1372:
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We can probably do this:
- Transfer both justFinishedContainers and finishedContainersSentToAM to the
new attempt irrespective work-preserving AM restart is enabled or not, so that
second attempt could continously ack previous finished containers.
- In pullJustFinishedContainers, we can check if work-preserving AM restart is
enabled. If it is, we return all the attempts’ finished containers. If it is
not enabled, only return current attempt’s containers.
> Ensure all completed containers are reported to the AMs across RM restart
> -------------------------------------------------------------------------
>
> Key: YARN-1372
> URL: https://issues.apache.org/jira/browse/YARN-1372
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Bikas Saha
> Assignee: Anubhav Dhoot
> Attachments: YARN-1372.001.patch, YARN-1372.001.patch,
> YARN-1372.002_NMHandlesCompletedApp.patch,
> YARN-1372.002_RMHandlesCompletedApp.patch,
> YARN-1372.002_RMHandlesCompletedApp.patch, YARN-1372.003.patch,
> YARN-1372.004.patch, YARN-1372.005.patch, YARN-1372.005.patch,
> YARN-1372.prelim.patch, YARN-1372.prelim2.patch
>
>
> Currently the NM informs the RM about completed containers and then removes
> those containers from the RM notification list. The RM passes on that
> completed container information to the AM and the AM pulls this data. If the
> RM dies before the AM pulls this data then the AM may not be able to get this
> information again. To fix this, NM should maintain a separate list of such
> completed container notifications sent to the RM. After the AM has pulled the
> containers from the RM then the RM will inform the NM about it and the NM can
> remove the completed container from the new list. Upon re-register with the
> RM (after RM restart) the NM should send the entire list of completed
> containers to the RM along with any other containers that completed while the
> RM was dead. This ensures that the RM can inform the AM's about all completed
> containers. Some container completions may be reported more than once since
> the AM may have pulled the container but the RM may die before notifying the
> NM about the pull.
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