I just checked an the same behavior exists with the
SimplePessimisticEJBLock. =(
--jason
On Mon, 20 Aug 2001, Jason Dillon wrote:
> I am running into another odd problem, this time it looks like ejbLoad() is
> being called on a modified entity with out ejbStore() being called first.
> I am not really sure why this would happen, nor do I know where to start
> looking.
>
> I am using isModified() to show that an entity has changed. The current
> impl simply logs a message and returns a boolean flag. I implemented a
> setModified(), which sets that flag to true and logs a message. I am seeing
> bean is modified message, then shortly after on the same entity I see an
> ejbLoad() but there is no message about checking if the entity has been
> modified.
>
> This might be caused by two different threads accessing the bean, so the tx
> might be confused... but it is my understanding that this should work.
>
> Essentially one user thread invokes a SFSB in a loop. This bean creates
> jms messages. A MDB on another machine does something with the message and
> sends a response message back. Then another MDB in the same VM as the SFSB
> takes the message and updates 3 entities that were created by the SFSB to
> track the message.
>
> Due to this problem, the bookkeeping for the messages are inconsistent, which
> more or less breaks the application completely.
>
> Is it possible that this might be caused by the new locking system? I am
> currently use the QueuedPessimisticEJBLock locking policy on all entities.
> I might try SimplePessimisticEJBLock, but I wanted to get some input from
> the experts first, as to why this might be happening.
>
> At first I thought that there might be more than one Entity per PK being
> created, but I am not seeing that.
>
> If someone could advise me on where I can look to find out more how this
> works it would really be appreciated.
>
> --jason
>
>
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