jBPM with multithreaded JobExecutor

[kadlecp]

Hello,

I would like to ask whether someone here tried to manage jBPM process in distributed environment (on each JBoss would be jBPM and they would share db). Or at least if anybody tried to manage process by more threads (JobExecutor with more threads). I now have discussion http://www.jboss.com/index.html?module=bb&op=viewtopic&t=137032&postdays=0&postorder=asc&start=0 in jBPM forum about that and I encounter errors related to StaleObjectStateException. I do not know if I have badly configured environment or if it is not possible in current implementation.

I have distributed ESB services, but jBPM slows me down when only one thread is used for JobExecotur.

Have anybody tried that successfully?

Thanks
Pavel

[bernard.tison]

Pavel,

Yes, I have seen the same exceptions when using jBPM in a cluster, all instances using the same db.

according to http://jira.jboss.com/jira/browse/JBPM-995 this is expected behaviour, as jBPM synchronizes on the database using optimistic locking.

Bernard

[kadlecp]

Hello Bernard,

hmmmm,.... thanks for answer. So I will try it with the expected behaviour. I hope that there will not be a lot of retries (it seems to me that there is too many retries that slows down performance in my simple scenarious).

If I have some spare time, I will try pesimisistic locking but I expect deadlock issues with this type of locking.

Pavel

[mvecera]

Recently we were dealing with problems in running JobExecutor in more than 1 thread. See http://jira.jboss.org/jira/browse/JBPM-1072 for instance. Unfortunatelly, I feel like it is not reliable at the moment.
Dev guys, correct me if I'm wrong...

[marklittle]

What "it" are you referring to?