I have a POJO which has a column protected Case data; @Type ( type="serializable" ) @Basic( fetch=FetchType.EAGER ) public Case getData () { return data; } public void setData (Case data) { this.data = data; } I am iterating over every element in the corresponding database table. Session session = HibernateUtil.currentSession(); SQLQuery query = session.createSQLQuery( "select case_id from wf_case" ); query.addScalar( "case_id", Hibernate.LONG ); List<Long> caseList = query.list(); for ( Long caseId : caseList ) { WfCase wfCase = (WfCase)session.load( WfCase.class, caseId ); if ( wfCase.getData() == null ) { System.out.println( "IS null: " + caseId ); } session.evict( wfCase ); } when I run this, after running through 1500 or 2000 (this number changes between runs), I start getting null returns from wfCase.getData(). After that point, it always returns null. If I call session.evict( wfCase ) on an wfCase which returned null, I get the following exception. Exception in thread "main" java.lang.reflect.UndeclaredThrowableException at $Proxy23.evict(Unknown Source) at hibernate.test.MilestoneCheck.main(MilestoneCheck.java:64) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301) ... 2 more Caused by: java.lang.NoSuchMethodError: com.gblx.improv.fit2flow.engine.WfCase.getHibernateLazyInitializer()Lorg/hibernate/proxy/LazyInitializer; at com.gblx.improv.fit2flow.engine.WfCase$$EnhancerByCGLIB$$616ee93d.getHibernateLazyInitializer(<generated>) at org.hibernate.event.def.DefaultEvictEventListener.onEvict(DefaultEvictEventListener.java:47) at org.hibernate.impl.SessionImpl.fireEvict(SessionImpl.java:965) at org.hibernate.impl.SessionImpl.evict(SessionImpl.java:957) ... 6 more Now, if I change the session.load to session.get, it runs through without any problems. I thought maybe the second level cache provider was to blame, but I switched to using <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> in my cfg file, and I still had the same problem. Note, I had the same problem when I wasn't using a serializable type, but was rather just mapping it to a byte[].