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https://issues.apache.org/jira/browse/HBASE-12929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14293560#comment-14293560
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Ted Yu commented on HBASE-12929:
--------------------------------
+1
> TableMapReduceUtil.initTableMapperJob unnecessarily limits the types of
> outputKeyClass and outputValueClass
> -----------------------------------------------------------------------------------------------------------
>
> Key: HBASE-12929
> URL: https://issues.apache.org/jira/browse/HBASE-12929
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Reporter: Will Temperley
> Priority: Minor
> Labels: mapreduce
> Attachments: HBASE-12929.patch
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The initTableMapperJob methods in TableMapReduceUtil which take multiple
> scans unnecessarily limit the types of the outputKeyClass and
> outputValueClass parameters, requiring them to extend WritableComparable and
> Writable respectively.
> In my specific use case, therefore, I cannot create a mapper job which
> outputs an hbase.client.Result.
> The methods in the MapReduce API to set map output key and value types do not
> impose this restriction.
> The other overloads of initTableMapperJob do not have this limitation - the
> restrictions were removed by https://issues.apache.org/jira/browse/HBASE-7024
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