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Date: Thu, 13 Oct 2011 10:45:12 +0000 (UTC)
From: "chackaravarthy (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3035) MR V2 jobhistory does not
 contain rack information
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126478#comment-13126478 ] 

chackaravarthy commented on MAPREDUCE-3035:
-------------------------------------------

yeah thanks for your inputs Amar :-)
                
> MR V2 jobhistory does not contain rack information
> --------------------------------------------------
>
>                 Key: MAPREDUCE-3035
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3035
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Karam Singh
>            Assignee: chackaravarthy
>            Priority: Blocker
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-3035.patch
>
>
> When topology.node.switch.mapping.impl is set to enable rack-locality resolution via the topology script, from the RM web-UI, we can see the rack information for each node. Running a job also reveals the information about rack-local map tasks launched at end of job completion on the client side.
> But the hostname field for attempts in the JobHistory does not contain this rack information.
> In case of hadoop-0.20 securiy or MRV1, hostname field of job history does contain rackid/hostname whereas in MRV2, hostname field only contains the hostIP. Thus this is a regression.

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