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Posted to common-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2013/06/28 23:15:20 UTC

[jira] [Updated] (HADOOP-9676) make maximum RPC buffer size configurable

     [ https://issues.apache.org/jira/browse/HADOOP-9676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Colin Patrick McCabe updated HADOOP-9676:
-----------------------------------------

    Attachment: HADOOP-9676.001.patch
    
> make maximum RPC buffer size configurable
> -----------------------------------------
>
>                 Key: HADOOP-9676
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9676
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HADOOP-9676.001.patch
>
>
> Currently the RPC server just allocates however much memory the client asks for, without validating.  It would be nice to make the maximum RPC buffer size configurable.  This would prevent a rogue client from bringing down the NameNode (or other Hadoop daemon) with a few requests for 2 GB buffers.  It would also make it easier to debug issues with super-large RPCs or malformed headers, since OOMs can be difficult for developers to reproduce.

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