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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5672) TestLruBlockCache#testBackgroundEvictionThread fails occasionally
Date Wed, 25 Apr 2012 03:16:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13261259#comment-13261259

Hadoop QA commented on HBASE-5672:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

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

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 5 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

     -1 core tests.  The patch failed these unit tests:

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/1638//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/1638//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/1638//console

This message is automatically generated.
> TestLruBlockCache#testBackgroundEvictionThread fails occasionally
> -----------------------------------------------------------------
>                 Key: HBASE-5672
>                 URL: https://issues.apache.org/jira/browse/HBASE-5672
>             Project: HBase
>          Issue Type: Bug
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>         Attachments: HBASE-5672.patch, HBASE-5672v2.patch, HBASE-5672v3.patch
> We find TestLruBlockCache#testBackgroundEvictionThread fails occasionally.
> I think it's a problem of the test case.
> Because runEviction() only do evictionThread.evict():
> {code}
> public void evict() {
>       synchronized(this) {
>         this.notify(); // FindBugs NN_NAKED_NOTIFY
>       }
>     }
> {code}
> However when we call evictionThread.evict(), the evictionThread may haven't been in run()
in the TestLruBlockCache#testBackgroundEvictionThread.
> If we run the test many times, we could find failture easily.

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