Jim Challenger created UIMA-4260:
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Summary: DUCC: RM Leave unpreemptable requests pending if can't be
filled
Key: UIMA-4260
URL: https://issues.apache.org/jira/browse/UIMA-4260
Project: UIMA
Issue Type: Improvement
Components: DUCC
Affects Versions: 1.1.0-Ducc
Reporter: Jim Challenger
Assignee: Jim Challenger
Fix For: 2.0.0-Ducc
RM should no longer refuse requests for un-fillable un-preemptable requests and
instead leave them pending.
Use cases:
1. Multi-step experiments that include a number of short unpreemptable steps
issued in parallel. In this case it is known that all requests will be
fulfilled within a reasonable time so they should not be refused.
2. Multiple cooperative schedulers. In some scenarios DUCC may be able to
request additional resources based on load; for example, in some cloud
configurations. In this case, we know the request may be fulfilled within a
reasonable time.
There are cases with no assurance that sufficient resources will be made
available but in practice these are rare compared to the cases above. In these
cases human intervention will be necessary.
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