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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7338) Fix flaky condition for org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange
Date Wed, 12 Dec 2012 21:09:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13530324#comment-13530324
] 

Hadoop QA commented on HBASE-7338:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12560621/HBASE-7338.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 104 warning
messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 23 new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.master.TestMasterMetrics

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/3497//console

This message is automatically generated.
                
> Fix flaky condition for org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-7338
>                 URL: https://issues.apache.org/jira/browse/HBASE-7338
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.94.3, 0.96.0
>            Reporter: Himanshu Vashishtha
>            Priority: Minor
>         Attachments: HBASE-7338.patch
>
>
> The balancer doesn't run in case a region is in-transition. The check to confirm whether
there all regions are assigned looks for region count > 22, where the total regions are
27. This may result in a failure:
> {code}
> java.lang.AssertionError: After 5 attempts, region assignments were not balanced.
> 	at org.junit.Assert.fail(Assert.java:93)
> 	at org.apache.hadoop.hbase.TestRegionRebalancing.assertRegionsAreBalanced(TestRegionRebalancing.java:203)
> 	at org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange(TestRegionRebalancing.java:123)
> .....
> 2012-12-11 13:47:02,231 INFO  [pool-1-thread-1] hbase.TestRegionRebalancing(120): Added
fourth server=p0118.mtv.cloudera.com,44414,1355262422083
> 2012-12-11 13:47:02,231 INFO  [RegionServer:3;p0118.mtv.cloudera.com,44414,1355262422083]
regionserver.HRegionServer(3769): Registered RegionServer MXBean
> 2012-12-11 13:47:02,231 DEBUG [pool-1-thread-1] master.HMaster(987): Not running balancer
because 1 region(s) in transition: {c786446fb2542f190e937057cdc79d9d=test,kkk,1355262401365.c786446fb2542f190e937057cdc79d9d.
state=OPENING, ts=1355262421037, server=p0118.mtv.cloudera.com,54281,1355262419765}
> 2012-12-11 13:47:02,232 DEBUG [pool-1-thread-1] hbase.TestRegionRebalancing(165): There
are 4 servers and 26 regions. Load Average: 13.0 low border: 9, up border: 16; attempt: 0
> 2012-12-11 13:47:02,232 DEBUG [pool-1-thread-1] hbase.TestRegionRebalancing(171): p0118.mtv.cloudera.com,51590,1355262395329
Avg: 13.0 actual: 11
> 2012-12-11 13:47:02,232 DEBUG [pool-1-thread-1] hbase.TestRegionRebalancing(171): p0118.mtv.cloudera.com,52987,1355262407916
Avg: 13.0 actual: 15
> 2012-12-11 13:47:02,233 DEBUG [pool-1-thread-1] hbase.TestRegionRebalancing(171): p0118.mtv.cloudera.com,48044,1355262421787
Avg: 13.0 actual: 0
> 2012-12-11 13:47:02,233 DEBUG [pool-1-thread-1] hbase.TestRegionRebalancing(179): p0118.mtv.cloudera.com,48044,1355262421787
Isn't balanced!!! Avg: 13.0 actual: 0 slop: 0.2
> 2012-12-11 13:47:12,233 DEBUG [pool-1-thread-1] master.HMaster(987): Not running balancer
because 1 region(s) in transition: 
> {code}

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