Tassapol Athiapinya created YARN-2144:
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Summary: Add logs when preemption occurs
Key: YARN-2144
URL: https://issues.apache.org/jira/browse/YARN-2144
Project: Hadoop YARN
Issue Type: Improvement
Components: capacityscheduler
Affects Versions: 2.5.0
Reporter: Tassapol Athiapinya
There should be easy-to-read logs when preemption does occur.
1. For debugging purpose, RM should log this.
2. For administrative purpose, RM webpage should have a page to show recent
preemption events.
RM logs should have following properties:
* Logs are retrievable when an application is still running and often flushed.
* Can distinguish between AM container preemption and task container preemption
with container ID shown.
* Should be INFO level log.
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