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https://issues.apache.org/jira/browse/YARN-3480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14527847#comment-14527847
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Jun Gong commented on YARN-3480:
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[~jianhe], sorry for not specifying our scenario: RM HA is enabled, use ZK to
store apps' info, most apps running in the cluster are long running(service)
apps, yarn.resourcemanager.am.max-attempts is set to 10000 because we have not
patched YARN-611 and we want apps to retry more times. There are 10K apps with
1~10000 attempts stored in ZK. It will take about 6 mins to recover those apps
when RM HA.
{quote}
1. How often do you see an app failed with a large number of attempts? If it's
limited to a few apps. I wouldn't worry so much.
2. How slower it is in reality in your case? we've done some benchmark,
recovering 10k apps(with 1 attempt) on ZK is pretty fast, within 20 seconds or
so.
{quote}
Please see above. I think it will be OK for map-reduce jobs. But it might not
be OK for service apps which have been running several months.
{quote}
3. Limiting the attempts to be recorded means we are losing history. it's a
trade off.
{quote}
Yes, I agree.
> Make AM max attempts stored in RMAppImpl and RMStateStore to be configurable
> ----------------------------------------------------------------------------
>
> Key: YARN-3480
> URL: https://issues.apache.org/jira/browse/YARN-3480
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Affects Versions: 2.6.0
> Reporter: Jun Gong
> Assignee: Jun Gong
> Attachments: YARN-3480.01.patch, YARN-3480.02.patch,
> YARN-3480.03.patch
>
>
> When RM HA is enabled and running containers are kept across attempts, apps
> are more likely to finish successfully with more retries(attempts), so it
> will be better to set 'yarn.resourcemanager.am.max-attempts' larger. However
> it will make RMStateStore(FileSystem/HDFS/ZK) store more attempts, and make
> RM recover process much slower. It might be better to set max attempts to be
> stored in RMStateStore.
> BTW: When 'attemptFailuresValidityInterval'(introduced in YARN-611) is set to
> a small value, retried attempts might be very large. So we need to delete
> some attempts stored in RMStateStore and RMStateStore.
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