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Posted to common-issues@hadoop.apache.org by "Bharath Mundlapudi (JIRA)" <ji...@apache.org> on 2010/07/02 22:53:54 UTC

[jira] Updated: (HADOOP-6713) The RPC server Listener thread is a scalability bottleneck

     [ https://issues.apache.org/jira/browse/HADOOP-6713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bharath Mundlapudi updated HADOOP-6713:
---------------------------------------

    Attachment: HADOOP-6713-rel20.patch

Attached the patch for Y20S branch.

> 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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