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https://issues.apache.org/jira/browse/YARN-4496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15109235#comment-15109235
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Jian He commented on YARN-4496:
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yeah, I actually tried to make them common when I started writing the patch
initially. but because of some other logic divergence, making them common
requires nontrival refactoring on RM and maybe hdfs too. I'd like to keep them
as is and open a jira separately
> Improve HA ResourceManager Failover detection on the client
> -----------------------------------------------------------
>
> Key: YARN-4496
> URL: https://issues.apache.org/jira/browse/YARN-4496
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: client, resourcemanager
> Reporter: Arun Suresh
> Assignee: Jian He
> Attachments: YARN-4496.1.patch, YARN-4496.2.patch
>
>
> HDFS deployments can currently use the {{RequestHedgingProxyProvider}} to
> improve Namenode failover detection in the client. It does this by
> concurrently trying all namenodes and picks the namenode that returns the
> fastest with a successful response as the active node.
> It would be useful to have a similar ProxyProvider for the Yarn RM (it can
> possibly be done by converging some the class hierarchies to use the same
> ProxyProvider)
> This would especially be useful for large YARN deployments with multiple
> standby RMs where clients will be able to pick the active RM without having
> to traverse a list of configured RMs.
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