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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2016/03/09 00:01:40 UTC

[jira] [Created] (YARN-4779) Fix AM container allocation logic in SLS

Wangda Tan created YARN-4779:
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             Summary: Fix AM container allocation logic in SLS
                 Key: YARN-4779
                 URL: https://issues.apache.org/jira/browse/YARN-4779
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Wangda Tan
            Assignee: Wangda Tan


Currently, SLS uses unmanaged AM for simulated map-reduce applications. And first allocated container for each app is considered to be the master container.

This could be problematic when preemption happens. CapacityScheduler preempt AM container at lowest priority, but the simulated AM container isn't recognized by scheduler -- it is a normal container from scheduler's perspective.

This JIRA tries to fix this logic: do the real AM allocation instead of using unmanaged AM.



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