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https://issues.apache.org/jira/browse/YARN-1434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13831180#comment-13831180
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Sandy Ryza commented on YARN-1434:
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Srikanth, this would happen if the AM can return containers faster than the RM
can assign them. The AM would then, as Carlo said, continually be the one that
"deserves" a container.
It should definitely be possible to make this problem show up under the right
circumstances. When I have time I will try to verify whether YARN-1010 fully
eliminates the problem.
> Single Job can affect fairshare of others
> -----------------------------------------
>
> Key: YARN-1434
> URL: https://issues.apache.org/jira/browse/YARN-1434
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Reporter: Carlo Curino
> Priority: Minor
>
> A job receiving containers and deciding not to use them and yielding them
> back in the next heartbeat could significantly affect the amount of resources
> given to other jobs.
> This is because by yielding containers back the job appears always to be
> under-capacity (more than others) so it is picked to be the next to receive
> containers.
> Observed by Robert Grandl, to be independently confirmed.
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