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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9338) Test Big Linked List fails on Hadoop 2.1.0
Date Wed, 28 Aug 2013 23:57:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753059#comment-13753059
] 

Elliott Clark commented on HBASE-9338:
--------------------------------------

Ok, so I'm pretty sure that I have it.  Hadoop 2.1.0 was a red herring.  I just noticed the
failures around then because I had upped the test iterations in preparation for a 0.96 rc.

Pretty sure the cause is Online Schema Change.  I've been running lots of different tests,
and whenever I have those chaos monkey actions then IntegrationTestLoadAndVerify passes. 
I'm running IntegrationTestBigLinkedList right now to make sure that is the issue for both.
 But I think there is some bug where data can be skipped or returned mal-formed while the
change is in progress.  So if the IntegrationTestBigLinkedList run passes (takes about 8 hours
with the number of iterations we run on the cluster) then I think we should disable Online
Schema Change for 0.96.

I know I was the one that enabled it, but I think this will help with stability for the upcoming
release.
                
> Test Big Linked List fails on Hadoop 2.1.0
> ------------------------------------------
>
>                 Key: HBASE-9338
>                 URL: https://issues.apache.org/jira/browse/HBASE-9338
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.96.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>            Priority: Critical
>             Fix For: 0.96.0
>
>         Attachments: HBASE-9338-0.patch
>
>


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