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Posted to common-issues@hadoop.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2014/10/25 00:44:34 UTC

[jira] [Commented] (HADOOP-11226) ipc.Client has to use setTrafficClass() with IPTOS_LOWDELAY|IPTOS_RELIABILITY

    [ https://issues.apache.org/jira/browse/HADOOP-11226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14183665#comment-14183665 ] 

Gopal V commented on HADOOP-11226:
----------------------------------

Patch is not complete, as it takes care of only RFC 1349 compat mode.

Needs to implement RFC 2474 protocol changes as well.

http://docs.oracle.com/javase/1.5.0/docs/api/java/net/Socket.html#setPerformancePreferences%28int,%20int,%20int%29

> ipc.Client has to use setTrafficClass() with IPTOS_LOWDELAY|IPTOS_RELIABILITY
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-11226
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11226
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 2.6.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>         Attachments: HADOOP-11226.1.patch
>
>
> During heavy shuffle, packet loss for IPC packets was observed from a machine.
> Avoid packet-loss and speed up transfer by using 0x14 QOS bits for the packets.



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