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https://issues.apache.org/jira/browse/YARN-556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13640012#comment-13640012
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Bikas Saha commented on YARN-556:
---------------------------------
Adding brief description of proposal from YARN-128 design document for Google
Summer of Code.
{noformat}
Work preserving restart - RM will have to make the RMAppAttempt state machine
enter
the Running state before starting the internal services. The RM can obtain
information
about all running containers from the NM’s when the NM’s heartbeat with it.
This
information can be used to repopulate the allocation state of scheduler. When
the
running AM’s heartbeat with RM then the RM can ask them to resend their
container
requests so that the RM can repopulate all the pending requests. Repopulating
the
running container and pending container information completes all the data
needed by
the RM to start normal operations.
{noformat}
> RM Restart phase 2 - Design for work preserving restart
> -------------------------------------------------------
>
> Key: YARN-556
> URL: https://issues.apache.org/jira/browse/YARN-556
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Labels: gsoc2013
>
> The basic idea is already documented on YARN-128. This will describe further
> details.
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