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https://issues.apache.org/jira/browse/HADOOP-1397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HADOOP-1397:
--------------------------

    Attachment: hadoop1397.patch

Here is a patch that replaces all instances of HLocking with instances of 
ReentrantReadWriteLock.

Hairong Kuang:  Any chance you'd try this patch on your machine first before I 
mark this issue with patch available'.  I would like to be sure that this patch 
does not introduce regression of HADOOP-1341 "TestHBaseCluster fails with 
IllegalMonitorStateException" (I've run unit tests on a couple of machines, 
both single and multiprocessor and it passes fine).  Thanks Hairong.

> Replace custom hbase locking with java.util.concurrent.locks.ReentrantLock
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-1397
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1397
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: contrib/hbase
>            Reporter: stack
>            Priority: Minor
>         Attachments: hadoop1397.patch
>
>
> HBase has a locking class that is effectively a clone of 
> java.util.concurrent.locks.ReentrantLock.  This issue is about replacing 
> HLocking with the java native implementation.

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