VADAGA ANANYO RAO created YARN-10617:
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Summary: Fifo and Fair intra-queue preemption goes on indefinitely
when apps are in pending state due to max AM limit reached
Key: YARN-10617
URL: https://issues.apache.org/jira/browse/YARN-10617
Project: Hadoop YARN
Issue Type: Improvement
Components: capacity scheduler
Affects Versions: 3.1.1
Reporter: VADAGA ANANYO RAO
Assignee: VADAGA ANANYO RAO
This case occurs when:
1. an application gets submitted in a cluster running at max-AM limit.
2. The new job requests AM resource. So it has 1 pending request.
3. To fulfil this request, the preemption logic preempts 1 resource from a
running app.
4. Because the cluster is at max-AM limit, the scheduler re-assigns the
preempted container back to the running app.
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