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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-3575) Job using 2.5 jars fails on a 2.6 cluster whose RM has been restarted
Date Tue, 03 Nov 2015 23:39:27 GMT

     [ https://issues.apache.org/jira/browse/YARN-3575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli resolved YARN-3575.
-------------------------------------------
    Resolution: Won't Fix

Agreed. I requested that this be filed largely for documentation concerns.

There is one simple way sites can avoid this _incompatibility_: Do not use RM-recovery on
a 2.6+ cluster while you still have applications running versions < 2.6. Once all apps
are upgraded to 2.6+, you can enable RM-recovery and perform work-preserving RM restarts and
rolling upgrades.

Closing this for now as won't fix. Please reopen if you disagree. Thanks.

> Job using 2.5 jars fails on a 2.6 cluster whose RM has been restarted
> ---------------------------------------------------------------------
>
>                 Key: YARN-3575
>                 URL: https://issues.apache.org/jira/browse/YARN-3575
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>
> Trying to launch a job that uses the 2.5 jars fails on a 2.6 cluster whose RM has been
restarted (i.e.: epoch != 0) becaue the epoch number starts appearing in the container IDs
and the 2.5 jars no longer know how to parse the container IDs.



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