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Bug #4506

Exception is thrown during workflow execution

Added by Michal Owsiak almost 10 years ago. Updated over 9 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
core
Target version:
Start date:
10/27/2009
Due date:
% Done:

0%

Estimated time:
Bugzilla-Id:
4506

Description

Within PN like workflow it seems that one thread iterates through the hashmap while other one modifies the data of the hashmap. Maybe Hashtable should be used here?

Or external synchronization should be used?

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:810)
at java.util.HashMap$KeyIterator.next(HashMap.java:845)
at ptolemy.actor.process.ProcessDirector.stopFire(ProcessDirector.java:481)
at ptolemy.actor.CompositeActor.stopFire(CompositeActor.java:1375)
at ptolemy.actor.CompositeActor.requestChange(CompositeActor.java:1184)
at ptolemy.kernel.util.NamedObj.requestChange(NamedObj.java:1651)
at ptolemy.vergil.basic.RunnableGraphController.managerStateChanged(RunnableGraphController.java:181)
at ptolemy.actor.Manager._notifyListenersOfStateChange(Manager.java:1363)
at ptolemy.actor.Manager._setState(Manager.java:1378)
at ptolemy.actor.Manager.wrapup(Manager.java:1270)
at ptolemy.actor.Manager.execute(Manager.java:365)
at ptolemy.actor.Manager.run(Manager.java:1071)
at ptolemy.actor.Manager$3.run(Manager.java:1112)

History

#1 Updated by Christopher Brooks almost 10 years ago

Is there a test case?

#2 Updated by Michal Owsiak almost 10 years ago

If it comes to the use case - yes and no.

It fails during execution of the workflow that combines PN and DDF directors.

Unfortunately, the workflow will not help in this case because it requires an access to HPC/GRID resources - which means it is useless as long as you don't have an access to the machines that are used.

I have prepared the similar case - but very simple, but it doesn't fail. I will try to create the use case that doesn't require an access to the machines - so it can be used as test case.

#3 Updated by Chad Berkley over 9 years ago

Seems like a workflow bug, not a kepler bug.

#4 Updated by Redmine Admin over 6 years ago

Original Bugzilla ID was 4506

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