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https://issues.apache.org/jira/browse/HADOOP-1841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12547337
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Koji Noguchi commented on HADOOP-1841:
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Just wanted to note that we had couple of occasions when one user
1) Started many dfsclients on a single node
2) Load on that client node became too high that its rpc read speed slowed down
significantly
3) Namenode became unresponsive
Rebooting that client node brought back the namenode.
I'm hoping this patch would solve such cases.
> 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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