Using annotations on iSeries (possible bug?)

tgoorden · **Joined:** Mon Mar 07, 2005 7:25 am **Posts:** 10

We're having serious problems using Hibernate 3.2 plus Annotations 3.2CR2 on iSeries AS400.

When using annotated entities, the SessionFactory refuses to start up, with the following exception:

Code:

java.lang.NullPointerException                                                                                                      
 at java.lang.ClassLoader.defineClass(ClassLoader.java:651)                                                                         
 at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:170)                                                         
 at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1812)                                     
 at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:866)                                              
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1231)                                             
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198)                                             
 at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:350)                                                                   
 at org.hibernate.cfg.AnnotationBinder.bindDefaults(AnnotationBinder.java:187)                                                      
 at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:251)                                   
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1205)

We've also noticed the following:
- The application does work on a Windows machine.
- When using xml mappings instead of annotations, it works on iSeries as well.
- Annotations in itself work on the iSeries, we've done a separate test on this (JVM 1.5.0_03-b07).

I cannot seem to correlate line number 187 with anything that makes sense in AnnotationBinder.java. I have no idea why the line numbers wouldn't match, but I guess that's a separate issue.

I'm seriously thinking we're onto a bug here, any help would be greatly appreciated.

emmanuel · **Posted:** Tue Sep 19, 2006 12:38 pm

This definitively looks like a bug in the way the VM load things, I cannot call loadClassInternal myself, so it is triggered by the VM somehow.

Which VM are you using, Sun's? IBM's

tgoorden · **Joined:** Mon Mar 07, 2005 7:25 am **Posts:** 10

JVM: IBM 1.5.0_03-b07 (this is an iSeries machine)

We're currently updating to a JVM that's a bit more recent, I will update here if it solves the problem.