Vincent Behar created MAPREDUCE-4849:
----------------------------------------
Summary: TaskSelector not used in FairScheduler
Key: MAPREDUCE-4849
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4849
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/fair-share
Affects Versions: 1.1.1, 1.0.4
Reporter: Vincent Behar
The documentation (http://hadoop.apache.org/docs/r1.0.4/fair_scheduler.html)
describes the mapred.fairscheduler.taskselector parameter as an "extension
point", but while the FairScheduler does instantiate the custom TaskSelector
provided this way, it does not call any of its methods (obtainNewMapTask,
obtainNewReduceTask, neededSpeculativeMaps or neededSpeculativeReduces).
We should either update the FairScheduler to use the TaskSelector when
scheduling a task, or completely remove the TaskSelector and update the
documentation.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
