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From "Subru Krishnan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5711) Propogate exceptions back to client when using hedging RM failover provider
Date Tue, 25 Oct 2016 01:58:58 GMT

     [ https://issues.apache.org/jira/browse/YARN-5711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Subru Krishnan updated YARN-5711:
---------------------------------
    Summary: Propogate exceptions back to client when using hedging RM failover provider 
(was: Propogate exceptions back to client after RM failover when using hedging failover provider)

> Propogate exceptions back to client when using hedging RM failover provider
> ---------------------------------------------------------------------------
>
>                 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, YARN-5711-v2.patch, YARN-5711.v1.1.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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