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https://issues.apache.org/jira/browse/HADOOP-3478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601640#action_12601640
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Arun C Murthy commented on HADOOP-3478:
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Jothi, the reason you don't want to sort by MapId is HADOOP-1270. Given that it
is quite hard to sort by MapId for a given location.
The one option is to schedule *some* failed fetches before the normal ones in
{{ReduceCopier.fetchOutputs}}, however it is very real that Jetty on the
task-tracker is stuck for a few seconds and then untangles itself, please keep
that in mind too.
> 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
>
> The algorithm to decide map re-execution on fetch failures can be improved.
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