[
https://issues.apache.org/jira/browse/MAPREDUCE-1198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779778#action_12779778
]
Scott Chen commented on MAPREDUCE-1198:
---------------------------------------
My intention is that when a task type is rejected once, it should always be
rejected. Since it is the first condition in || (or), if it is true the
following condition checks will be skipped.
But you are right, this will not change the logic if we remove it. If it is
confusing, I think it is OK to remove it.
> Alternatively schedule different types of tasks in fair share scheduler
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-1198
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1198
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/fair-share
> Affects Versions: 0.22.0
> Reporter: Scott Chen
> Assignee: Scott Chen
> Fix For: 0.22.0
>
> Attachments: MAPREDUCE-1198-v1.patch, MAPREDUCE-1198-v2.patch
>
>
> Matei has mentioned in MAPREDUCE-961 that the current scheduler will first
> try to launch map tasks until canLaunthTask() returns false then look for
> reduce tasks. This might starve reduce task. He also mention that
> alternatively schedule different types of tasks can solve this problem.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
