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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10597) RPC Server signals backoff to clients when all request queues are full
Date Thu, 23 Apr 2015 16:33:40 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arpit Agarwal updated HADOOP-10597:
-----------------------------------
    Summary: RPC Server signals backoff to clients when all request queues are full  (was:
Evaluate if we can have RPC client back off when server is under heavy load)

> RPC Server signals backoff to clients when all request queues are full
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-10597
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10597
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>         Attachments: HADOOP-10597-2.patch, HADOOP-10597-3.patch, HADOOP-10597-4.patch,
HADOOP-10597-5.patch, HADOOP-10597-6.patch, HADOOP-10597.patch, MoreRPCClientBackoffEvaluation.pdf,
RPCClientBackoffDesignAndEvaluation.pdf
>
>
> Currently if an application hits NN too hard, RPC requests be in blocking state, assuming
OS connection doesn't run out. Alternatively RPC or NN can throw some well defined exception
back to the client based on certain policies when it is under heavy load; client will understand
such exception and do exponential back off, as another implementation of RetryInvocationHandler.



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