reschedule method of Timer utility in Muse will give illegal state exceptions
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Key: MUSE-154
URL: http://issues.apache.org/jira/browse/MUSE-154
Project: Muse
Issue Type: Bug
Components: Utilities - General, QName, and XML
Affects Versions: 2.0.0, 2.1.0
Environment: any
Reporter: Mohammad Fakhar
Assigned To: Dan Jemiolo
Priority: Minor
The reschedule method of Timer utility gives the following error upon execution:
java.lang.IllegalStateException: Task already scheduled or cancelled
at java.util.Timer.sched(Timer.java:331)
at java.util.Timer.schedule(Timer.java:157)
Here is the scenario:
1) I schedule a resource for termination at time X using the scheduled life
time capability.
2) 5 seconds later, I re-schedule the same resource for termination at time Y
(where Y is > X).
3) The lifetime capabilites use the Timer utility underneath the covers and
upon rescheduling, the reschedule
method is called in SimpleScheduledTermination implementation:
_terminationTimer.reschedule(time);
4) The reschedule method cancels the task, creates a new instance of a timer
and schedules the SAME instance of the task with the new timer:
Timer.reschedule {
............
cancel();
_timer = new java.util.Timer();
schedule(whenToFire);
}
Timer.schedule {
..........
_timer.schedule(_task, whenToFire);
}
5) Now, java.util.Timer doesn't allow you to schedule the same instance of a
previously cancelled task EVEN with a new timer instance (I experimented with
it on the side). This is not explicit in the jdk javadoc, but it won't allow
you to do this. Not sure if this should be a jdk bug or not, but I thought I
would get it documented here at least.
6) this problem will surface whenever Muse implements the WS-N Renew function.
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