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https://issues.apache.org/jira/browse/HIVE-219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662456#action_12662456
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Ashish Thusoo commented on HIVE-219:
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yes we should move to miniMR. The nfs related problem also seem to be related 
to what we do in MapRedTask in the local mode.

> Map-side aggregates output one row per reducer when not grouping
> ----------------------------------------------------------------
>
>                 Key: HIVE-219
>                 URL: https://issues.apache.org/jira/browse/HIVE-219
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: David Phillips
>            Priority: Critical
>
> Example: SELECT count(1) FROM table;

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