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https://issues.apache.org/jira/browse/YARN-5711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15593646#comment-15593646
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Subru Krishnan edited comment on YARN-5711 at 10/21/16 1:42 AM:
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Attaching a patch that returns any exception encountered with the active RM as
discussed offline with [~jianhe]. Thanks to [~ellenfkh] for extensively testing
this out in our cluster.
FYI, there are some formatting fixes in *RequestHedgingRMFailoverProxyProvider*
as it seems to follow intellij formatter rather than standard hadoop.
was (Author: subru):
Attaching a patch that returns any exception encountered with the active RM as
discussed offline with [~jianhe]. Thanks to [~ellenfkh] for extensively testing
this out in our cluster.
> AM cannot reconnect to RM after failover when using
> RequestHedgingRMFailoverProxyProvider
> -----------------------------------------------------------------------------------------
>
> Key: YARN-5711
> URL: https://issues.apache.org/jira/browse/YARN-5711
> Project: Hadoop YARN
> Issue Type: Bug
> Components: applications, resourcemanager
> Affects Versions: 2.9.0, 3.0.0-alpha1
> Reporter: Subru Krishnan
> Assignee: Subru Krishnan
> Priority: Critical
> Attachments: YARN-5711-v1.patch
>
>
> When RM failsover, it does _not_ auto re-register running apps and so they
> need to re-register when reconnecting to new primary. This is done by
> catching {{ApplicationMasterNotRegisteredException}} in *allocate* calls and
> re-registering. But *RequestHedgingRMFailoverProxyProvider* does _not_
> propagate {{YarnException}} as the actual invocation is done asynchronously
> using seperate threads, so AMs cannot reconnect to RM after failover.
> This JIRA proposes that the *RequestHedgingRMFailoverProxyProvider* propagate
> any {{YarnException}} that it encounters.
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