Bugs item #528697, was opened at 2002-03-11 22:22 You can respond by visiting: http://sourceforge.net/tracker/?func=detail&atid=376685&aid=528697&group_id=22866
Category: JBossCMP Group: v3.0 Rabbit Hole Status: Open Resolution: None Priority: 5 Submitted By: Hunter Hillegas (hunterhillegas) Assigned to: Nobody/Anonymous (nobody) Summary: JBossCMP Doing Unnecessary UPDATES Initial Comment: I have two 2.0 CMP entity beans in a relationship: ProductBean ProductLineItemBean There is a CMR relation between the two (One to Many). Both beans have a method called getValueObject() that creates and populates a JavaBean Value Object that is sent to the client (servlet in this case). This method is very simple, just pulling the values using getXXXX() and returning. When I call getValueObject() on an instance of the Product bean, I get the value object as expected and there is no writing to the database, just the SELECT to fetch the values. When I call getValueObject() on the ProductLineItemBean I can see the SELECT to populate the VO, then I see an UPDATE statement for each instance of ProductLineItemBean that is related to Product (in my test 2). The UPDATE is setting the foreign key value for the relation to the ProductBean, though it's using the same value, so there isn't any actual change. The getValueObject() method shouldn't be writing to the database at all. What happens with a large dataset is that all the updates create long lag times in the transactions as many are stalled waiting to do unnecessary updates while the rows are locked... This makes the process grind to a screeching halt. I have a simple EAR that reproduces the problem. ---------------------------------------------------------------------- You can respond by visiting: http://sourceforge.net/tracker/?func=detail&atid=376685&aid=528697&group_id=22866 _______________________________________________ Jboss-development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
