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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10099) Reduce chance for RPC denial of service
Date Thu, 14 Nov 2013 11:03:25 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13822312#comment-13822312
] 

Steve Loughran commented on HADOOP-10099:
-----------------------------------------

I also know of other datacenter RPC systems that throttle by client -stops any individual
client from DoSing a service when it unintentionally makes too many requests

> Reduce chance for RPC denial of service
> ---------------------------------------
>
>                 Key: HADOOP-10099
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10099
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Priority: Minor
>
> A RPC server may accept an unlimited number of connections unless indirectly bounded
by a blocking operation in the RPC handler threads.  The NN's namespace locking happens to
cause this blocking, but other RPC servers such as yarn's generate async events which allow
unbridled connection acceptance.



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