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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6459) IPC server should set SO_KEEPALIVE to the accepted sockets
Date Tue, 26 Jan 2010 11:18:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12804976#action_12804976

Hudson commented on HADOOP-6459:

Integrated in Hadoop-Common-trunk #233 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk/233/])
    . IPC client bug may cause rpc call hang. Contributed by Hairong Kuang.

> IPC server should set SO_KEEPALIVE to the accepted sockets
> ----------------------------------------------------------
>                 Key: HADOOP-6459
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6459
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 0.20.1
>            Reporter: Qi Liu
>         Attachments: HADOOP-6459.0.20.patch, HADOOP-6459.patch
> When there is some unexpected network outage or client-side issue, the network connection
could stay alive forever, due to the lack of keep alive. We have observed such dead connection
in name node. Though it has no known performance hits, but it is a waste of resource. Adding
SO_KEEPALIVE to all accepted sockets should not be heavy, since the keep alive TCP packets
will only be sent once every four hours.

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