[jira] [Commented] (MAPREDUCE-6661) hostLocalAssigned remains zero after scheduling

["Haibo Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15387134#comment-15387134 ] 

Haibo Chen commented on MAPREDUCE-6661:
---------------------------------------

[~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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