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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6649) [0.92 UNIT TESTS] TestReplication.queueFailover occasionally fails [Part-1]
Date Wed, 19 Sep 2012 16:49:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13458839#comment-13458839

Jean-Daniel Cryans commented on HBASE-6649:

bq. This would be a dataloss issue without the fix.
bq. I have seen dataloss issues (via the unit test) without this patch..

FWIW if there was indeed dataloss caused by this, it would have been when recovering logs.
During normal operation that exception was retried until we're able to read the file.

bq. could you please try this patch out in your cluster.

It's not exactly a test cluster, more like prod-ish, so I'll put it on only one machine. I
assume it might take the whole day to hit the condition.
> [0.92 UNIT TESTS] TestReplication.queueFailover occasionally fails [Part-1]
> ---------------------------------------------------------------------------
>                 Key: HBASE-6649
>                 URL: https://issues.apache.org/jira/browse/HBASE-6649
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>             Fix For: 0.96.0, 0.92.3, 0.94.2
>         Attachments: 6649-0.92.patch, 6649-1.patch, 6649-2.txt, 6649-fix-io-exception-handling.patch,
6649-trunk.patch, 6649-trunk.patch, 6649.txt, HBase-0.92 #495 test - queueFailover [Jenkins].html,
HBase-0.92 #502 test - queueFailover [Jenkins].html
> Have seen it twice in the recent past: http://bit.ly/MPCykB & http://bit.ly/O79Dq7
> Looking briefly at the logs hints at a pattern - in both the failed test instances, there
was an RS crash while the test was running.

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