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https://issues.apache.org/jira/browse/HADOOP-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Jenson updated HADOOP-1615:
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Status: Patch Available (was: Open)
> Replacing thread notification-based queue with
> java.util.concurrent.BlockingQueue in HMaster
> --------------------------------------------------------------------------------------------
>
> Key: HADOOP-1615
> URL: https://issues.apache.org/jira/browse/HADOOP-1615
> Project: Hadoop
> Issue Type: Improvement
> Components: contrib/hbase
> Affects Versions: 0.13.0
> Reporter: Steve Jenson
> Priority: Trivial
> Fix For: 0.13.0
>
>
> In HMaster, there is a msgQueue typed as an ArrayList<PendingOperations>.
> PendingOperations are added to the queue and notify() is called on msgQueue.
> I think using a BlockingQueue<PendingOperations> makes the intent of the code
> more clear and removes potentially problematic synchronization issues.
> BlockingQueues are thread-safe and allow multiple producers and consumers. I
> have written a patch for this and will attach it.
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