We have not moved the EJB to WebSphere Server yet. We are still developing
in Visual Age 3.0 and using the WebSphere Test Environment. The only
properties I can change, are the transaction attributes, including stuff
like TX_SUPPORTED, isReentrant, and Transaction_SERIALIZABLE. This problem
occurs on CMP's with and without associations. I have tried various
settings of the above, and yet it still holds the lock on the file. Any
suggestions or help would be greatly appreciated.
>From: Scott Deboy <[EMAIL PROTECTED]>
>To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
>Subject: RE: Need Help EJB's with CMP Are causing a Lock on AS400- README
>Date: Sat, 25 Mar 2000 00:50:27 -0800
>
>I assume you're using Websphere?
>
>In Websphere's admin console, we had concurrency issues (we were getting
>rollbacks ) until we set a flag on CMP EJB's properties page for beans that
>were updatable (not all of ours were).
>
>If I recall it was a checkbox that marked the bean 'find for update' - I'm
>not sure if that's the problem but check property help for the EJB bean
>properties page.
>
>It should point to something (unless you're having lock problems because
>you're locking resource A first in one place and then B and in the other
>place you're locking resource B 1st and then A.)
>
>Good luck.
>
> > ----------
> > From: Meredith Seitchik[SMTP:[EMAIL PROTECTED]]
> > Sent: Friday, March 24, 2000 8:58 PM
> > To: [EMAIL PROTECTED]
> > Subject: Need Help EJB's with CMP Are causing a Lock on AS400- README
> >
> > I am having trouble with creating EJB's with Container Managed
>Persistance
> > with the AS400 as the datasource. Unfortunately, THE EJB IS CAUSING A
> > LOCK
> > on the AS400 file that CMP is mapped to. This causes updates from the
> > legacy
> > system not to occur. I have tried setting various transactional
> > attributes,
> > but, unfortunately, it seems to not have any effect on the Pessimistic
> > locking. Has anyone faced this issue or have any suggestions. Please
> > reply
> > with advice. This is a major issue that is unfortunately preventing us
> > from
> > moving further in using EJB's in our project. Any help is appreciated.
> > Thank you.
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