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https://issues.apache.org/jira/browse/YARN-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13995147#comment-13995147
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Jason Lowe commented on YARN-2046:
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We should consider sending out of band heartbeats after a container completes
rather than when a container is killed. For a cluster running MapReduce this
should be almost equivalent in terms of number of OOB heartbeats sent since the
MR AM always kills completed task attempts until MAPREDUCE-5465 is addressed.
> Out of band heartbeats are sent only on container kill and possibly too early
> -----------------------------------------------------------------------------
>
> Key: YARN-2046
> URL: https://issues.apache.org/jira/browse/YARN-2046
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 0.23.10, 2.4.0
> Reporter: Jason Lowe
>
> [~mingma] pointed out in the review discussion for MAPREDUCE-5465 that the NM
> is currently sending out of band heartbeats only when stopContainer is
> called. In addition those heartbeats might be sent too early because the
> container kill event is asynchronously posted then the heartbeat monitor is
> notified.
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