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https://issues.apache.org/jira/browse/HADOOP-2274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12545319
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Hadoop QA commented on HADOOP-2274:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12370167/patch.txt
against trunk revision r597959.
@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 appears to introduce 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/1155/testReport/
Findbugs warnings:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1155/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1155/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1155/console
This message is automatically generated.
> [hbase] Excess synchronization introduced by HADOOP-2139 negatively impacts
> performance
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-2274
> URL: https://issues.apache.org/jira/browse/HADOOP-2274
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Affects Versions: 0.16.0
> Reporter: Jim Kellerman
> Assignee: Jim Kellerman
> Fix For: 0.16.0
>
> Attachments: patch.txt
>
>
> Phase 2 of HADOOP-2139 introduced more widely scoped synchronization to
> prevent the concurrent modification exceptions reported in HADOOP-2163. This
> has negatively impacted performance. Investigate synchronization and
> determine if it can be accomplished at a more fine grained level.
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