Jay Buffington created AURORA-1122:
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             Summary: Show preemption_delay in web ui
                 Key: AURORA-1122
                 URL: https://issues.apache.org/jira/browse/AURORA-1122
             Project: Aurora
          Issue Type: Task
            Reporter: Jay Buffington


--preemption_delay (see 
https://github.com/apache/incubator-aurora/blob/master/src/main/java/org/apache/aurora/scheduler/async/preemptor/PreemptorModule.java#L47-L50)
 isn't documented in the user-guide 
https://github.com/apache/incubator-aurora/blob/master/docs/user-guide.md#user-content-giving-priority-to-production-tasks-preempting
 and since it is a system setting the end user has noway of knowing an an 
operator might have set it to.

Right now when a production job is submitted and the cluster is "full" of 
non-prod jobs the prod job will go into "PENDING" state and the user will see a 
message such as "Insufficient CPU"  There is no acknowledgement that the job 
will attempt to preempt non-prod jobs after some operator configured amount of 
time.  This is confusing to users.

I propose when a prod job cannot be immediately scheduled the UI gives the user 
a message that says something to the effect "Will attempt to preempt 
non-production Jobs in ~9m42s"



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