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https://issues.apache.org/jira/browse/HADOOP-3630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624674#action_12624674
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Hudson commented on HADOOP-3630:
--------------------------------
Integrated in Hadoop-trunk #581 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/581/])
> CompositeRecordReader: key and values can be in uninitialized state if files
> being joined have no records
> ---------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-3630
> URL: https://issues.apache.org/jira/browse/HADOOP-3630
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.17.0
> Reporter: Jingkei Ly
> Assignee: Chris Douglas
> Fix For: 0.18.0
>
> Attachments: 3630-0.patch, 3630-1.patch
>
>
> I am using org.apache.hadoop.mapred.join.CompositeInputFormat to do an
> outer-join across a number of SequenceFiles. This works fine in most
> circumstances, but I get NullPointerExceptions/uninitialized data (where
> Writable#readFields() has not been called) when some of the files being
> joined have no records in them.
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