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From "Ted Yu (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4651) ConcurrentModificationException might be thrown in TestHCM.testConnectionUniqueness
Date Mon, 24 Oct 2011 17:56:34 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu resolved HBASE-4651.
---------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
    
> ConcurrentModificationException might be thrown in TestHCM.testConnectionUniqueness
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-4651
>                 URL: https://issues.apache.org/jira/browse/HBASE-4651
>             Project: HBase
>          Issue Type: Test
>    Affects Versions: 0.92.0
>            Reporter: gaojinchao
>            Assignee: gaojinchao
>            Priority: Minor
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4651_Trunk.patch
>
>
> See
> https://builds.apache.org/view/G-L/view/HBase/job/HBase-TRUNK/2357/testReport/junit/org.apache.hadoop.hbase.client/TestHCM/testConnectionUniqueness
> 363     Entry<K,V> nextEntry() {
> 364         if (modCount != expectedModCount)
> 365         throw new
> ConcurrentModificationException<http://kickjava.com/src/java/util/ConcurrentModificationException.java.htm>
> [image:
> JavaDoc] <http://kickjava.com/2487.htm>();
> Read more:
> http://kickjava.com/src/java/util/LinkedHashMap.java.htm#ixzz1bbCC0gaT
> HCM uses proper synchronization when accessing HBASE_INSTANCES.
> Looking at TestHCM.getValidKeyCount(), it puts values of HBASE_INSTANCES in a Set and
returns the size of the Set.
> However, post HBASE-3777, the values (HConnectionImplementation's) in HBASE_INSTANCES
would be unique.
> TestHCM.getValidKeyCount() can be removed from the test.

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