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https://issues.apache.org/jira/browse/MAPREDUCE-5231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13671901#comment-13671901
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Vinod Kumar Vavilapalli commented on MAPREDUCE-5231:
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This DB* code is a bit of a mind-bender w.r.t mapred and mapreduce impls.
Looks good, +1. Checking this in.
> Constructor of DBInputFormat.DBRecordReader in mapred is changed
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-5231
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5231
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Attachments: MAPREDUCE-5231.1.patch
>
>
> The constructor of DBInputFormat.DBRecordReader in mapred is changed from MR1
> to RM2. Though MAPREDUCE-716 tried to deal with the API difference. However,
> if DBInputFormat.DBRecordReader is extended, the incompatibility around the
> constructor is still there.
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