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https://issues.apache.org/jira/browse/HADOOP-1841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12547222
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Owen O'Malley commented on HADOOP-1841:
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I think on RPC patches, it is a very good idea to run a sort on 500 nodes to 
make sure that the system remains stable.

> IPC server should write repsonses asynchronously
> ------------------------------------------------
>
>                 Key: HADOOP-1841
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1841
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: ipc
>            Reporter: Doug Cutting
>            Assignee: dhruba borthakur
>         Attachments: asyncRPC-2.patch, asyncRPC.patch, asyncRPC.patch
>
>
> Hadoop's IPC Server currently writes responses from request handler threads 
> using blocking writes.  Performance and scalability might be improved if 
> responses were written asynchronously.

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