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https://issues.apache.org/jira/browse/YARN-6600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16153330#comment-16153330
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Rohith Sharma K S commented on YARN-6600:
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Here are offline discussion summary on above comments
bq. But could be configured as 0 also, is that invalid ?
Yes, 0 and -1 are invalid. It is documented in both capacity-scheduler.xml and
capacityscheduler.md file.
bq. Is it possible that admin might not know how much max some special app may
run?
It is pretty debatable topic. As we discussed, if admin required to do so, he
can directly configure max lifetime and disable default lifetime. I will update
patch to handle this case so that max lifetime is considered as default
lifetime if admin misses to configure.
bq. we could return with maximumApplicationLifetime
make sense to me
bq. If maximumApplicationLifetime is not configured, we ll get Long.MAX_VALUE
for queueMaxLifetimeInSec.
Good catch! Its a major comment :P As discussed offline, lets introduce new
scheduler API getMaximumApplicationLifetime(String queueName), During update,
default lifetime does not take any precedency!!
5th, 6th, and 7th comments make sense me and I will update those in next patch.
> Enhance default lifetime of application at LeafQueue level.
> -----------------------------------------------------------
>
> Key: YARN-6600
> URL: https://issues.apache.org/jira/browse/YARN-6600
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
> Attachments: YARN-6600.01.patch, YARN-6600.02.patch, [YARN-6600]
> Extend lifetime to scheduler Leaf Queue.pdf
>
>
> Setting timeout at LeafQueue level allows admin to control from bad apps
> which uses most of the resources for all the time.
> Example : Any application submitted to particular queue i.e QUEUE-1 should
> not run more than N hours. Even user set lifetime as N+1 hour, the
> application will be killed after N hours.
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