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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4911) Reduce PeerCache timeout to be commensurate with dfs.datanode.socket.reuse.keepalive
Date Thu, 06 Feb 2014 21:14:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-4911:
---------------------------------------

       Resolution: Fixed
    Fix Version/s: 2.4.0
           Status: Resolved  (was: Patch Available)

> Reduce PeerCache timeout to be commensurate with dfs.datanode.socket.reuse.keepalive
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-4911
>                 URL: https://issues.apache.org/jira/browse/HDFS-4911
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>             Fix For: 2.4.0
>
>         Attachments: HDFS-4911.001.patch
>
>
> The default timeout for the client's PeerCache is much longer than the DataNode would
possibly keep the socket open.  Specifically, {{dfs.client.socketcache.expiryMsec}} defaults
to 2 *
> 60 * 1000 (2 minutes), whereas {{dfs.datanode.socket.reuse.keepalive}}
> defaults to 1000 (1 second).  We should make these more similar to minimize situations
where the client tries to use sockets which have gone stale.



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