[
https://issues.apache.org/jira/browse/SPARK-2277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14050381#comment-14050381
]
Chen He commented on SPARK-2277:
--------------------------------
This is interesting. I will take a look.
> Make TaskScheduler track whether there's host on a rack
> -------------------------------------------------------
>
> Key: SPARK-2277
> URL: https://issues.apache.org/jira/browse/SPARK-2277
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Rui Li
>
> When TaskSetManager adds a pending task, it checks whether the tasks's
> preferred location is available. Regarding RACK_LOCAL task, we consider the
> preferred rack available if such a rack is defined for the preferred host.
> This is incorrect as there may be no alive hosts on that rack at all.
> Therefore, TaskScheduler should track the hosts on each rack, and provides an
> API for TaskSetManager to check if there's host alive on a specific rack.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
