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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7338) Fix flaky condition for org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange
Date Sat, 05 Jan 2013 00:44:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544429#comment-13544429
] 

Hudson commented on HBASE-7338:
-------------------------------

Integrated in HBase-0.94-security-on-Hadoop-23 #10 (See [https://builds.apache.org/job/HBase-0.94-security-on-Hadoop-23/10/])
    HBASE-7338 Fix flaky condition for org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange
(Revision 1423115)

     Result = FAILURE
stack : 
Files : 
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java

                
> 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
>            Assignee: Himanshu Vashishtha
>            Priority: Minor
>             Fix For: 0.96.0, 0.94.4
>
>         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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