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https://issues.apache.org/jira/browse/MAPREDUCE-1488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833139#action_12833139
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Arun C Murthy commented on MAPREDUCE-1488:
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We've seen instances of wild, very large, jobs putting the NameNode under
significant pressure with a lot of unnecessary calls e.g. lisStatus from each
map etc. These counters will aid diagnostics significantly.
> Add framework counters to track NN accesses
> -------------------------------------------
>
> Key: MAPREDUCE-1488
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1488
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Fix For: 0.22.0
>
>
> Shoot-off from HDFS-974.
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