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https://issues.apache.org/jira/browse/HBASE-4278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093022#comment-13093022
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Hudson commented on HBASE-4278:
-------------------------------

Integrated in HBase-TRUNK #2157 (See 
[https://builds.apache.org/job/HBase-TRUNK/2157/])
    HBASE-4278  Race condition in Slab.java that occurs due to spinlock 
unlocking
               early (Li Pi)

tedyu : 
Files : 
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/slab/Slab.java


> Race condition in Slab.java that occurs due to spinlock unlocking early
> -----------------------------------------------------------------------
>
>                 Key: HBASE-4278
>                 URL: https://issues.apache.org/jira/browse/HBASE-4278
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Li Pi
>            Assignee: Li Pi
>             Fix For: 0.92.0
>
>         Attachments: 4278.diff, 4278.diff
>
>
> Just a race condition in 4027. Occurs due to a spinlock that happens if the 
> slab allocator is empty. When the slab allocator gets gets a slice of memory 
> returned, if multiple threads are locked, both can be freed at the same time, 
> leading one to throw an exception.

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