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[protege-owl] New thread in propertyValueChanged IllegalStateException

Timothy Redmond tredmond at
Mon Jan 14 10:50:08 PST 2008

There  should be a more detailed description of the error in the  
protege logs.  Look in the protege installation directory and in the  
logs directory.  Then (the tricky part) find the right log file and  
you will see a full IllegalStateException stack trace.  If this  
doesn't make the problem immediately clear then send us the stack trace.

Also Thread.stop is not recommended for very good reason.  (Note it is  
deprecated in the javadoc.) It can leave your data structures in an  
inconsistent state.  To see how bad this could be imagine if some  
library like Xerces found its datastructures corrupted.  Fun to debug  
and impossible to fix.

If you find that we have committed this sin then please let me know.   
The recommended way to stop a thread is to have the thread operation  
to do a sort of polling technique where it checks at various  
convenient moments to see if it should abort.  I know it is awkward  
but I don't know a better way.


On Jan 12, 2008, at 1:20 PM, zhang weishan wrote:

> Dear All,
>   I want to execute the swrl rules when property Value Changed, and  
> then i used the listening mechanism propertyValueChanged. And then I  
> will need to parse the swrl inferred result. Therefore i new  
> separate thread for this, but i got the following warning, though  
> the system seems working... Any idea on this issue?
>  Best,
>  Weishan
> WARNING: Exception caught java.lang.IllegalStateException: Cannot  
> stop if not currently running. --  
> EventDispatchFrameStore.dispatchEvents()
>      [java] WARNING: use fine logging for more details --  
> EventDispatchFrameStore.dispatchEvents()
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