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https://issues.apache.org/jira/browse/YARN-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16477692#comment-16477692
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Miklos Szegedi edited comment on YARN-7715 at 5/16/18 4:34 PM:
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[~yangjiandan], none of these are the job of this jira. This Jira is about
setting the cgroup based on the setting already propagated to node manager and
taken care of. I agree the flag needs to be in state store, however this has
nothing to do with cgroups. Please file a separate Jira for that. Also I am not
convinced that the AM has to be notified about cgroup errors. cgroup has to be
as transparent and failsafe as possible. Any communication to the AM would just
add unnecessary network overhead and probably does not solve the problem. The
information that some cgroup update failed on some node might be interesting to
the AM but it is not actionable.
was (Author: miklos.szeg...@cloudera.com):
[~yangjiandan], none of these are the job of this jira. This Jira is about
setting the cgroup based on the setting already propagated to node manager and
taken care of. I agree the flag needs to be in state store, however this has
nothing to do with cgroups. Also I am not convinced that the AM has to be
notified about cgroup errors. cgroup has to be as transparent and failsafe as
possible. Any communication to the AM would just add unnecessary network
overhead and probably does not solve the problem. The information that some
cgroup update failed on some node might be interesting to the AM but it is not
actionable.
> Support NM promotion/demotion of running containers.
> ----------------------------------------------------
>
> Key: YARN-7715
> URL: https://issues.apache.org/jira/browse/YARN-7715
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Arun Suresh
> Assignee: Miklos Szegedi
> Priority: Major
> Fix For: 3.2.0
>
> Attachments: YARN-7715.000.patch, YARN-7715.001.patch,
> YARN-7715.002.patch, YARN-7715.003.patch, YARN-7715.004.patch
>
>
> In YARN-6673 and YARN-6674, the cgroups resource handlers update the cgroups
> params for the containers, based on opportunistic or guaranteed, in the
> *preStart* method.
> Now that YARN-5085 is in, Container executionType (as well as the cpu, memory
> and any other resources) can be updated after the container has started. This
> means we need the ability to change cgroups params after container start.
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