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https://issues.apache.org/jira/browse/MAPREDUCE-4574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472266#comment-13472266
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Hudson commented on MAPREDUCE-4574:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #2857 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2857/])
MAPREDUCE-4574. Fix TotalOrderParitioner to work with
non-WritableComparable key types. Contributed by Harsh J. (harsh) (Revision
1395936)
Result = FAILURE
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1395936
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/TotalOrderPartitioner.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/partition/TotalOrderPartitioner.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/partition/TestTotalOrderPartitioner.java
> 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
> Assignee: Harsh J
> Priority: Trivial
> Fix For: 3.0.0
>
> Attachments: MAPREDUCE-4574.patch, MAPREDUCE-4574.patch
>
>
> 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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