Hi.
Reposting this message. the next has already been received.
This list lacks stability a lot.
Not sure, if this has something to do with your problem.
1: java.util.List is an Interface. You can't have the Interface live,
except in a class/object, implementing this interface. For an instance the
class java.util.AbstractList is the first one, that implements this
interface. so having a parameter/return value of type java.util.List means
actualy an instance of a class implementing java.util.List.
2. Orion subclasses AbstractList in many places to implement it's lists.
Quite handy. One place is the list OR-mapping,
com.evermind.server.ejb.ORList. Are you sure, you don't use container
managed Lists?
BTW. I'm not exactly sure how do you access Concurently a StateLess
Session Bean? I tried and got no result... Hmmm...
Be well: Lachezar
> Hi ted,
> You are right, but the exeption is in an AbstractList and I'm not using
any
> extension of AbstractList. In addition, the exeption is in com.evermind
> pakage.
> I have analyzed this package and I've seen that the method
> com.evermind.server.rmi.RMIServer.gb uses a java.util.List. Therefore I
> suppose that it is an orion problem when the SLSB is created.
> Thanks, Esteban
>
>
>
> -----Original Message-----
> From: Rice, Ted [mailto:[EMAIL PROTECTED]]
> Sent: Friday, July 27, 2001 1:45 PM
> To: Orion-Interest
> Subject: RE: Concurrency
>
>
> you are working with a non-synchronized
> collection. if you get an iterator and
> attempt to modify the backing list with
> multiple threads you will receive a
> ConcurrentModificationException. synchronize
> on the the iterator or list.
>
> ./ted
>
> -----Original Message-----
> From: Lopez Esteban [mailto:[EMAIL PROTECTED]]
> Sent: Friday, July 27, 2001 3:44 AM
> To: Orion-Interest
> Subject: Concurrency
>
>
> > Hi
> > Please help me. I am working with a stateless EJB and I have about 250
> > clients which has to use this EJB.
> > When the clients access to the SLEJB concurretly, the Orion crash, and
the
> > server.log shows:
> >
> > 7/4/01 6:45 PM Internal server error
> > java.util.ConcurrentModificationException
> > at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
> > at java.util.AbstractList$Itr.next(Unknown Source)
> > at java.util.AbstractCollection.remove(Unknown Source)
> > at com.evermind.server.rmi.RMIServer.gb(JAX)
> > at com.evermind.server.rmi.ba.run(JAX)
> > at com.evermind.util.f.run(JAX)
> >
> > Anyone knows something about this.
> > Thanks!
> >
> > Esteban.
> >
>
>
>
>
