Konstantinos Karanasos created YARN-5887:
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Summary: Policies for choosing which opportunistic containers to
kill
Key: YARN-5887
URL: https://issues.apache.org/jira/browse/YARN-5887
Project: Hadoop YARN
Issue Type: Sub-task
Reporter: Konstantinos Karanasos
When a guaranteed container arrives at an NM but there are no resources to
start its execution, opportunistic containers will be killed to make space for
the guaranteed container.
At the moment, we kill opportunistic containers in reverse order of arrival
(first the most recently started ones). This is not always the right decision.
For example, we might want to minimize the number of containers killed: to
start a 6GB container, we could kill one 6GB opportunistic or three 2GB ones.
Another example would be to refrain from killing containers of jobs that are
very close to completion (we have to pass job completion information to the NM
in that case).
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