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https://issues.apache.org/jira/browse/HADOOP-1337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12494250
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Devaraj Das commented on HADOOP-1337:
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Made this a minor issue since the shuffle code does not have known issues
as-of-date. However, the DFA probably is the ideal model to go after.
> Each shuffle should proceed as a DFA
> ------------------------------------
>
> Key: HADOOP-1337
> URL: https://issues.apache.org/jira/browse/HADOOP-1337
> Project: Hadoop
> Issue Type: Improvement
> Components: mapred
> Reporter: Devaraj Das
> Priority: Minor
>
> The shuffle code (for fetching map outputs) should proceed as a DFA. The
> states (as Owen had mentioned on HADOOP-1183) are (INITIAL, LOCATED,
> FETCHING, DONE, FAILED). This is to ensure correctness of map output fetching.
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