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From "Uma Mahesh (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6762) exception while doing RPC I/O closes channel
Date Tue, 08 Jun 2010 04:31:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876541#action_12876541
] 

Uma Mahesh commented on HADOOP-6762:
------------------------------------

testRPCInterrupted3:--
i also feel this may be the test problem.
 in this test, inside run method it is throwing the exception i.e java.util.concurrent.BrokenBarrierException
This is happening some times.
I added some wait to complete all the threads before assertion.
This is happenning randomly...most of the times passing the test.
Please post the latest test.

> exception while doing RPC I/O closes channel
> --------------------------------------------
>
>                 Key: HADOOP-6762
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6762
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.20.2
>            Reporter: sam rash
>            Assignee: sam rash
>         Attachments: hadoop-6762-1.txt, hadoop-6762-2.txt, hadoop-6762-3.txt, hadoop-6762-4.txt,
hadoop-6762-6.txt, hadoop-6762-7.txt, hadoop-6762-8.txt
>
>
> If a single process creates two unique fileSystems to the same NN using FileSystem.newInstance(),
and one of them issues a close(), the leasechecker thread is interrupted.  This interrupt
races with the rpc namenode.renew() and can cause a ClosedByInterruptException.  This closes
the underlying channel and the other filesystem, sharing the connection will get errors.

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