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https://issues.apache.org/jira/browse/HADOOP-6713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884817#action_12884817
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Suresh Srinivas commented on HADOOP-6713:
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Comments for Y20 version of the patch.
# Please remove YAHOO-CHANGES.txt from the patch
# Remove blank changes that is diff between two patches: lines 51, 73, 138,
171, 203, 220. There could be others.
# line 283 exceeds 80 chars
> The RPC server Listener thread is a scalability bottleneck
> ----------------------------------------------------------
>
> Key: HADOOP-6713
> URL: https://issues.apache.org/jira/browse/HADOOP-6713
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 0.21.0
> Reporter: dhruba borthakur
> Assignee: Dmytro Molkov
> Fix For: 0.21.0
>
> Attachments: HADOOP-6713-rel20.patch, HADOOP-6713.2.patch,
> HADOOP-6713.patch
>
>
> The Hadoop RPC Server implementation has a single Listener thread that reads
> data from the socket and puts them into a call queue. This means that this
> single thread can pull RPC requests off the network only as fast as a single
> CPU can execute. This is a scalability bottlneck in our cluster.
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