65e290e7_orter_plugin_for_MR___ASF_JIRA__Reason
[Class] org.apache.hadoop.mapred.MapTask.MapOutputBuffer [Protection] Changed to a static inner class and protection changed from package protected to public [Annotation] Annotated as Public, Unstable [Reason] 
To be able to use the default implementation of PostMapProcessor.
[MAPREDUCE-2454] Allow external sorter plugin for MR - ASF JIRA