I see this problem on glassfish 3.1, inside a timer routine I run a named
query to return a list of pending events, run through the list processing
each event and set the state flag to 'processed'. As each event in the list
is a managed entity I don't call merge, but this should be ok, and the
changes should sync with the database when we commit, at the end of the timer
routine. But I have to call flush explicitly.
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