Hibernate version: 2.1.7.b

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:
java.lang.NullPointerException
net.sf.hibernate.collection.Set.iterator(Set.java:131)
kls.domain.entity.impl.AbstractHawb.lastMawb(Unknown Source)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
org.python.core.PyMethod.__call__(PyMethod.java)
org.python.core.PyObject.__call__(PyObject.java)
org.python.core.PyInstance.invoke(PyInstance.java)
org.python.pycode._pyx0.addScan$14(C:\cvs\kls-war\intranet\import\importDcs.py:316)
org.python.pycode._pyx0.call_function(C:\cvs\kls-war\intranet\import\importDcs.py)
org.python.core.PyTableCode.call(PyTableCode.java)
org.python.core.PyTableCode.call(PyTableCode.java)
org.python.core.PyFunction.__call__(PyFunction.java)
org.python.core.PyInstance.invoke(PyInstance.java)
org.python.pycode._pyx0.doPost$4(C:\cvs\kls-war\intranet\import\importDcs.py:125)
org.python.pycode._pyx0.call_function(C:\cvs\kls-war\intranet\import\importDcs.py)
org.python.core.PyTableCode.call(PyTableCode.java)
org.python.core.PyTableCode.call(PyTableCode.java)
org.python.core.PyTableCode.call(PyTableCode.java)
org.python.core.PyFunction.__call__(PyFunction.java)
org.python.core.PyMethod.__call__(PyMethod.java)
org.python.core.PyObject.__call__(PyObject.java)
org.python.core.PyObject._jcallexc(PyObject.java)
org.python.proxies.main$importDcs$0.doPost(Unknown Source)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
org.python.proxies.main$importDcs$0.service(Unknown Source)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.python.util.PyServlet.service(PyServlet.java)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:71)
org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:171)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)




Name and version of the database you are using: MySQL 3.23.58

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

What about the red box?

I'm very sorry.

This problem has come up in a production environment.
So I'm very out of my mind.

This system has been working fine.

The only thing I think that has changed, is that some attributes mapped using Hibernate are now derived.
So the getter return a calculation based on children in a Set
The attribute is still mapped, the derived value seems to make it back
to the database in all the testing I've done.

Would it encourage you if I said I owned a copy of Hibernate in Action?

It would encourage me (and others) if you provide COMPLETE and ACCURATE information about your problem. Nobody knows what you want.

P.S. We offer production support services with guaranteed response times in our customer support system.

I'm trying to boil it down to a test case.

That will help with providing mapping and code.

I can't seem to get hibernate DEBUG logging turned on though.

From looking through CVS logs for our project it seems the problem started with the derived attributes change.

Are there any limitations to having an attribute mapped where the getter uses a child Set in it's calculation?