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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