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https://issues.apache.org/jira/browse/MAPREDUCE-4574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J updated MAPREDUCE-4574:
-------------------------------
Priority: Trivial (was: Major)
> Fix TotalOrderParitioner to work with non-WritableComparable key types
> ----------------------------------------------------------------------
>
> Key: MAPREDUCE-4574
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4574
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client
> Affects Versions: 2.0.0-alpha
> Reporter: Harsh J
> Priority: Trivial
>
> The current TotalOrderPartitioner class will not work with an alternative
> serialization library such as Avro.
> To make it work, we may edit the readPartitions bits in it to support
> non-WritableComparable keys and also remove the WritableComparable check in
> the class types definition.
> That is, since we do not use the values at all (NullWritable), we may as well
> do:
> {code}
> private K[] readPartitions(FileSystem fs, Path p, Class<K> keyClass,
> Configuration conf) throws IOException {
> …
> while ((key = (K) reader.next(key)) != null) {
> parts.add(key);
> key = ReflectionUtils.newInstance(keyClass, conf);
> }
> …
> }
> {code}
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