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https://issues.apache.org/jira/browse/MAPREDUCE-3035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132910#comment-13132910
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chackaravarthy commented on MAPREDUCE-3035:
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I ran rumen tool executing TraceBuilder and Folder for the patch applied code.
It behaves same as previously.
But as Amar said, we can add the rack info also for map and reduce tasks if
required, but as of now this patch will not affect the rumen tool functioning.
> 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-3035-1.patch, 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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