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https://issues.apache.org/jira/browse/MAPREDUCE-3234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli reopened MAPREDUCE-3234:
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> Locality scheduling broken due to mismatch between IPs and hosts
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-3234
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3234
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Priority: Blocker
> Attachments: MR-3234.1.patch
>
>
> I noticed that, on a single-rack cluster, I wasn't getting hardly any data
> locality. The issue appears to be the code in RMContainerAllocator which
> changes the resource requests to use IP addresses instead of hostnames:
> {code}
> //host comes from data splitLocations which are hostnames.
> Containers
> // use IP addresses.
> //TODO Temporary fix for locality. Use resolvers from h-common.
> // Cache to make this more efficient ?
> {code}
> However, at least on my cluster, the resource manager sees node resources as
> hostnames, not IPs. Removing this code fixed data locality.
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