[jira] [Created] (REEF-1527) Graceful shutdown of the RuntimeClock is not so graceful: unconditionally clears the event queue

["Sergiy Matusevych (JIRA)" <ji...@apache.org>]

Sergiy Matusevych created REEF-1527:
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             Summary: Graceful shutdown of the RuntimeClock is not so graceful: unconditionally clears the event queue
                 Key: REEF-1527
                 URL: https://issues.apache.org/jira/browse/REEF-1527
             Project: REEF
          Issue Type: Bug
          Components: Wake
            Reporter: Sergiy Matusevych
            Assignee: Sergiy Matusevych


Wake {{RuntimeClock.close()}} method that is supposed to perform a graceful shutdown of the event loop, contains the following code:

{code:java}
this.schedule.clear();
this.schedule.add(new StopTime(findAcceptableStopTime()));
{code}

The problem is that {{findAcceptableStopTime()}} searches the schedule for the last client alarm - when the schedule has been cleared already.

We need to schedule StopTime event without clearing the schedule to allow graceful shutdown, but close the clock so no events will be scheduled after it..



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