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https://issues.apache.org/jira/browse/MAPREDUCE-6661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15387134#comment-15387134
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Haibo Chen commented on MAPREDUCE-6661:
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[~sultan] hostLocalAssigned is the # of mappers that ran on nodes where their
input is also stored locally. A mapper can be scheduled to run on data-local
nodes, rack-local nodes or anywhere in the cluster. The fact that
hostLocalAssigned remains zero while rackLocalAssinged gets updated simply
indicates that the mappers were not able to be scheduled on data-local nodes,
so they were run on rack-local nodes.
> hostLocalAssigned remains zero after scheduling
> ------------------------------------------------
>
> Key: MAPREDUCE-6661
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6661
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Sultan Alamro
> Priority: Critical
>
> In the AM log file I see that the hostLocalAssigned in
> org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator remains zero even
> after scheduling, but the rackLocalAssigned gets updated (I run it in one
> rack)
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