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Date: Sat, 15 Sep 2007 21:40:32 -0700 (PDT)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-1872) [hbase] TestCompaction assertions
 fail on some hosts
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    [ https://issues.apache.org/jira/browse/HADOOP-1872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12527822 ] 

Hadoop QA commented on HADOOP-1872:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12365928/samepatchdifferentname.patch
against trunk revision r575986.

    @author +1.  The patch does not contain any @author tags.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/775/testReport/
Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/775/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/775/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/775/console

This message is automatically generated.

> [hbase] TestCompaction assertions fail on some hosts
> ----------------------------------------------------
>
>                 Key: HADOOP-1872
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1872
>             Project: Hadoop
>          Issue Type: Bug
>          Components: contrib/hbase
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.15.0
>
>         Attachments: samepatchdifferentname.patch, testcompaction.patch
>
>
> Changes to TestCompaction introduced in hadoop-1768 passed an hudson build (#722) but reports on the hadoop irc have them failing on an an hp+ubuntu box:
> {code}
> cutting>	it's nothing fancy. /proc/cpuinfo shows "Intel(R) Pentium(R) 4 CPU 3.20GHz".
> <buenaventura>	Thats single-cpu...
> <cutting>	yep
> <cutting>	1GB of ram. bog standard pc.
> <cutting>	running java 5, not java 6, if that matters.
> {code}
> (Failed also w/ java6).
> The assertion that fails is count of row versions after a compaction and flush.  There are usually 4 -- the 3 from stores and one that is in a flush that happened 'concurrent' to the compaction -- but there can be 3 only (the maximum for a column) if non-intuitively the compaction thread starts after the flush finishes which can happen with certain jvm schedulers (hudson is one such).
> I commented out the assertions to get the build working again.  This issue is about adding them back in again in a manner that has them working on hudson and the bog-standard hp+ubuntu.

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