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https://issues.apache.org/jira/browse/CASSANDRA-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-4105.
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Resolution: Won't Fix
> Use WritableComparable / Writable in RecordReader
> -------------------------------------------------
>
> Key: CASSANDRA-4105
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4105
> Project: Cassandra
> Issue Type: Wish
> Components: Hadoop
> Affects Versions: 0.8.11, 1.0.9, 1.1.1, 1.2.0 beta 1
> Reporter: Patrik Modesto
>
> Cassandra uses ByteByffer/List<Mutation> as key/value in RecordWriter. This
> prevents the use of MultipleOutputs class that requires a key to be
> WritableComparable and value to be Writable. MultipleOutputs is a very handy
> class that provides a way to write to several differrent OutputFormats from a
> reducer. In our case I have a mapreduce job that produces two results which I
> need to write to Cassandra and to a file respectively and as for now I need
> to run that mapreduce twice which is quite expensive.
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