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anilit99
 Post subject: Hibernate in Jboss4.2.2
PostPosted: Mon Mar 03, 2008 4:18 pm 
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Joined: Wed Feb 20, 2008 6:42 pm
Posts: 14
Hi all,
Is it only me, or every body else know how to get around this ?
Heres my situation: I dont want to use hibernate jars which comes in Jboss4.2.2 distribution. These jars are old (3.2.1). I want to use the latest version with Jboss4.2.2.
I tried keeping my ear file isolated using the tag in ear-deployer.xml. But I am getting the classic ClassCastException. Somehow Jboss always wants to use its version of hibernate jar files.

Any help is highly appreciated !!

thanks
Anil.
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farzad
 Post subject: Re: Hibernate in Jboss4.2.2
PostPosted: Mon Mar 03, 2008 4:27 pm 
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Expert

Joined: Wed Apr 11, 2007 11:39 am
Posts: 735
Location: Montreal, QC
You will need to look into changing class loader policy from parent first to parent last. I don't specifically remember how you specify this in JBoss but google it and you should be happy. Also you may have to add hibernate.jar as a java module in application.xml file.



Farzad-
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anilit99
 Post subject:
PostPosted: Mon Mar 03, 2008 5:04 pm 
Newbie

Joined: Wed Feb 20, 2008 6:42 pm
Posts: 14
thanks a lot Farzad !

But unfortunately, I couldnt find out the right place to modify the parent first class loading policy. The only tag I could find is the one in jboss-web.deployer, which I changed and still end up in the same error. I added the hibernate3.jar in the application.xml.

May be I interpreted it wrongly: this is the chunk of exception I am getting:
Code:
java.lang.ClassCastException: org.hibernate.ejb.HibernatePersistence
   at org.jboss.ejb3.entity.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:245)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at org.jboss.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:103)
   at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
   at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)


thanks
Anil.
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farzad
 Post subject:
PostPosted: Mon Mar 03, 2008 5:09 pm 
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Expert

Joined: Wed Apr 11, 2007 11:39 am
Posts: 735
Location: Montreal, QC
Umm, I have never tried this one but since the exception is in a JBoss class it gives me the feeling a hibernate class might be already loaded before your application is loaded and that means you can't do much but to replace the hibernate jar in jboss lib directory.


Farzad-
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