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https://issues.apache.org/jira/browse/HADOOP-3478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Chansler updated HADOOP-3478:
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Release Note: Changed reducers to fetch maps in the same order for a given
host to speed up identification of the faulty maps; reducers still randomize
the host selection to distribute load. (was: Changes to make reducers fetch
maps in the same order (for a given host) to speed up identification of the
faulty maps. Reducers still randomize the host (to fetch) to distribute load.)
> The algorithm to decide map re-execution on fetch failures can be improved
> --------------------------------------------------------------------------
>
> Key: HADOOP-3478
> URL: https://issues.apache.org/jira/browse/HADOOP-3478
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Jothi Padmanabhan
> Assignee: Jothi Padmanabhan
> Fix For: 0.19.0
>
> Attachments: hadoop-3478-v1.patch, hadoop-3478.patch
>
>
> The algorithm to decide map re-execution on fetch failures can be improved.
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