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https://issues.apache.org/jira/browse/MAPREDUCE-3035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132931#comment-13132931
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Mahadev konar commented on MAPREDUCE-3035:
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@chakravarthy,
Can you please upload the patch with the Grant License to Apache check?
As a cursory glance, it looks like your resolve the hostname once in the
TaskAttemptImpl and again in MapFinishedEvent and ReduceFinishedEvent. Why isnt
the rack resolved once in the taskattemptimpl used in the finishedevents?
> 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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