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https://issues.apache.org/jira/browse/HADOOP-5979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716535#action_12716535
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Klaas Bosteels commented on HADOOP-5979:
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I think the best approach would be to let the partitioner command take
key/value pairs as input (just like the mapper command) and make it output a
(new) key for each pair, which then gets hashed to determine the partition
number for the pair. Any other thoughts or comments on this?
> Streaming partitioner should allow command, not just Java class
> ---------------------------------------------------------------
>
> Key: HADOOP-5979
> URL: https://issues.apache.org/jira/browse/HADOOP-5979
> Project: Hadoop Core
> Issue Type: Improvement
> Components: contrib/streaming
> Reporter: Klaas Bosteels
>
> Since HADOOP-4842 got committed, Streaming allows both commands and Java
> classes to be specified as mapper, reducer, and combiner, but the
> {{-partitioner}} option is still limited to Java classes only. Allowing
> commands to be specified as partitioner as well would greatly improve the
> flexibility of Streaming programs.
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