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https://issues.apache.org/jira/browse/YARN-8151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461768#comment-16461768
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Íñigo Goiri commented on YARN-8151:
-----------------------------------
The failed unit test seems unrelated and this feature is disabled by default so
the behavior should stay the same.
Committing to trunk.
Thanks [~youchen] for the patch and [~giovanni.fumarola] for the review.
> Yarn RM Epoch should wrap around
> --------------------------------
>
> Key: YARN-8151
> URL: https://issues.apache.org/jira/browse/YARN-8151
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Young Chen
> Assignee: Young Chen
> Priority: Major
> Attachments: YARN-8151.01.patch, YARN-8151.01.patch,
> YARN-8151.02.patch, YARN-8151.03.patch, YARN-8151.04.patch, YARN-8151.05.patch
>
>
> Right now RM Epoch values in sub clusters are seeded in different ranges: 0,
> 1000, 2000, etc. If one RM restarts enough its epoch can increment until it
> clashes with a neighboring sub cluster. E.g. 999 -> 1000. To fix this, we
> introduce a configurable range by which the epoch generation is bound.
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