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https://issues.apache.org/jira/browse/CASSANDRA-4834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kempe updated CASSANDRA-4834:
---------------------------------

    Attachment: trunk-CASSANDRA-4834.txt

lastColumn also needs a duplicated ByteBuffer.
Otherwise, if the column name is consumed in the map/reduce code, the 
expression in
https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/hadoop/ColumnFamilyRecordReader.java#L458
will evaluate to false and the CFRR can get into an infinite loop.
                
> Old-style mapred interface only populates row key for first column when using 
> wide rows
> ---------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4834
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4834
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 1.1.0
>            Reporter: Ben Kempe
>            Assignee: Ben Kempe
>            Priority: Minor
>             Fix For: 1.1.7
>
>         Attachments: TestJob.java, TestJobOldHadoop.java, 
> trunk-CASSANDRA-4834.txt
>
>
> When using the ColumnFamilyRecordReader with the old-style Hadoop interface 
> to iterate over wide row columns, the row key is only populated on the first 
> column.
> See attached tests.

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