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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-690) RM exits on token cancel/renew problems
Date Thu, 16 May 2013 21:05:19 GMT

    [ https://issues.apache.org/jira/browse/YARN-690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660001#comment-13660001
] 

Robert Joseph Evans commented on YARN-690:
------------------------------------------

I don't think this does what you want.  Now an IOException will cause the same issue.  I think
you need to handle runtime and IOException separately. 
                
> RM exits on token cancel/renew problems
> ---------------------------------------
>
>                 Key: YARN-690
>                 URL: https://issues.apache.org/jira/browse/YARN-690
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 3.0.0, 0.23.7, 2.0.5-beta
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: YARN-690.patch
>
>
> The DelegationTokenRenewer thread is critical to the RM.  When a non-IOException occurs,
the thread calls System.exit to prevent the RM from running w/o the thread.  It should be
exiting only on non-RuntimeExceptions.
> The problem is especially bad in 23 because the yarn protobuf layer converts IOExceptions
into UndeclaredThrowableExceptions (RuntimeException) which causes the renewer to abort the
process.  An UnknownHostException takes down the RM...

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