Read does not see last update

I've got multiple thread reading and modifying the same objects. Sometimes a read by one thread does not see a change made and committed by another thread. Looking at the log shows the update was done and it set the field properly. But the next read query returns the object with the old field value. Out of 100 executions this only occurrs 1-3 times. Is this a case of reading the old value from the read cache? If so, what is the best way to insure the read gets the latest version? I've tried setting the existence checking to database first and it didn't make any difference.

Rick,
I am going to assume this is all being done in a single JVM with a single ServerSession and thus one shared cache. If this is incorrect please correct me.
When the scheduler commits the changes made are written first to the database and then following the commit they are made to the cache. You said the JMS messages are committed in the same JTS TX. I would verify that the JMS messages and UnitOfWork are actually being committed together.
If all of the JTS TX stuff is right then what you are saying is that in a small percentage of cases the runner task is receiving the JMS message and reading the cached version of the objects prior to the scheduler's UnitOfWork completing its merge. This seems very unlikely given the simplicity of the changes described (but weirder things have happened, and its halloween).
What I would check next is to make sure the runner task is forcing a refresh of the (query.refreshIdentityMapResults) and if you are using optimistic locking then configure the descriptor to onlyRefreshIfNewerVersion. Let us know if this eliminates the condition and if all of my assumptions are correct.
Doug

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