Hibernate exception when starting Tomcat (after upgrade to hibernate-3.5.0)

Question

I'm getting the following exception when starting a tomcat instance with my web app after upgrading to hibernate 3.5.0:

org.hibernate.annotations.common.AssertionFailure: Fail to process type argument in a generic declaration. Type: class sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl

at org.hibernate.ejb.metamodel.AttributeFactory$PluralAttributeMetadataImpl.getClassFromGenericArgument(AttributeFactory.java:836) at org.hibernate.ejb.metamodel.AttributeFactory$PluralAttributeMetadataImpl.getClassFromGenericArgument(AttributeFactory.java:833) at org.hibernate.ejb.metamodel.AttributeFactory$PluralAttributeMetadataImpl.(AttributeFactory.java:748) at org.hibernate.ejb.metamodel.AttributeFactory$PluralAttributeMetadataImpl.(AttributeFactory.java:723) at org.hibernate.ejb.metamodel.AttributeFactory.determineAttributeMetadata(AttributeFactory.java:518) at org.hibernate.ejb.metamodel.AttributeFactory.buildAttribute(AttributeFactory.java:93)

As this happens on tomcat startup, I have no idea where to look in my code to prevent that :-( thanks for any help.

Answer 1

Putting that error message into google would have shown you any number of explanations, including this JIRA issue:

http://opensource.atlassian.com/projects/hibernate/browse/HHH-5098