309d9974_orter_plugin_for_MR___ASF_JIRA__Reason
[Class] org.apache.hadoop.mapreduce.task.reduce.Shuffle [Protection] No change [Annotation] Changed from Private, Unstable to Public, Unstable [Reason] 
Passed to external PreReduceProcessor plug-ins.
[MAPREDUCE-2454] Allow external sorter plugin for MR - ASF JIRA