Hi Mukul, Mukul Gandhi <muk...@apache.org> wrote on 06/08/2011 12:02:59 AM:
> > 2) Also under high load, I occasionally get this stack trace (this is > > not the cause of or symptom of item 1, it is a separate issue occurring at > > separate times) > > > java.lang.NullPointerException: > > (no message) > > at org.apache.xerces.dom.ParentNode.nodeListItem(Unknown Source) > > at org.apache.xerces.dom.ParentNode.item(Unknown Source) > > at freemarker.ext.dom.NodeListModel.<init>(NodeListModel.java:89) > > at freemarker.ext.dom.NodeModel.getChildNodes(NodeModel.java:302) > > at freemarker.ext.dom.ElementModel.get(ElementModel.java:124) > > at freemarker.core.Dot._getAsTemplateModel(Dot.java:76) > > The null pointer originates from your framework/application classes > (Dot.java -> ElementModel.java & so on). This may be an application > issue. You may run a debug session to see, which object along this > stack trace is null and on what data it is dependent on. No, I'm 99.99% sure this is a threading issue. ParentNode.nodeListItem() is one of several places you can get a NullPointerException if you don't synchronize. There's really no other way to get an NPE there. The application is merely passing in an int to the item() method. That either returns a Node or null if the index isn't valid. > -- > Regards, > Mukul Gandhi > > --------------------------------------------------------------------- > To unsubscribe, e-mail: j-users-unsubscr...@xerces.apache.org > For additional commands, e-mail: j-users-h...@xerces.apache.org Thanks. Michael Glavassevich XML Parser Development IBM Toronto Lab E-mail: mrgla...@ca.ibm.com E-mail: mrgla...@apache.org
