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  1. HBase
  2. HBASE-7338

Fix flaky condition for org.apache.hadoop.hbase.TestRegionRebalancing.testRebalanceOnRegionServerNumberChange

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 0.94.3, 0.95.2
    • Fix Version/s: 0.94.4, 0.95.0
    • Component/s: test
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      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:

      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: 
      

        Attachments

        1. HBASE-7338.patch
          1 kB
          Himanshu Vashishtha

          Activity

            People

            • Assignee:
              v.himanshu Himanshu Vashishtha
              Reporter:
              v.himanshu Himanshu Vashishtha
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              Dates

              • Created:
                Updated:
                Resolved: