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https://issues.apache.org/jira/browse/CRUNCH-139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gabriel Reid resolved CRUNCH-139.
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Resolution: Fixed
Pushed to master
> PCollection#length doesn't always reduce the count to a single value
> --------------------------------------------------------------------
>
> Key: CRUNCH-139
> URL: https://issues.apache.org/jira/browse/CRUNCH-139
> Project: Crunch
> Issue Type: Bug
> Reporter: Gabriel Reid
> Assignee: Gabriel Reid
> Fix For: 0.5.0
>
> Attachments: CRUNCH-139.patch
>
>
> PCollection#length doesn't explicitly set the number of reducers to 1, which
> means that the output of the counting mappers can be partitioned. This
> results only a partial count (i.e. an incorrect value) being returned in the
> length PObject if the input PCollection spans multiple default reduce
> partitions.
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