1 Reply Latest reply on Dec 8, 2002 11:55 PM by Michael Remijan

    EJB redeployment : ClassCastException

    Radu Mateescu Newbie

      Hello,
      I posted a simmilar message a couple of days ago, but, since I haven't got any response yet, I decided to post more information about what appears to be a serious bug with CMP redeployment. I tried the latest JBoss from sourceforge without any luck. Any advice in this matter would be highly appreciated.
      Briefly, here is the problem:
      A jar contains 2 CMP entity beans: EventBean and ProfileBean. ProfileBean holds a local reference to EventBean. When I first deploy the jar, everything goes fine, the ProfileBean is created fine, the local reference to EventBean is created fine as well and everything works good. The problem appears when I modify the EventBean and then redeploy the archive. The following line in ProfileBean generates the ClassCastException:

      EventLocalHome eventLocalHome = (EventLocalHome)initialContext.lookup("java:/comp/env/ejb/EventBean");


      2002-12-05 10:42:43,218 ERROR [iqos_ProfileBean] Exception
      java.lang.ClassCastException
      at com.inquent.iqos.ejb.Profile.ProfileBean.isEventAuthorized(ProfileBean.java:102)
      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:324)
      at org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.java:1097)
      at org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationInterceptor.java:95)
      at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:324)
      at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
      at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:91)
      at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
      at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
      at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:108)
      at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:267)
      at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:101)
      at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
      at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:206)
      at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:154)
      at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:481)
      at org.jboss.ejb.Container.invoke(Container.java:680)
      at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1026)
      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549)
      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:340)
      at sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
      at java.lang.Thread.run(Thread.java:536)



      Here is the ejb-jar.xml file for the jar bundle(never mind the bad design with CMP directly exposed to the clients without a session beans layer - it's just a test):

      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE ejb-jar PUBLIC
      "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN"
      "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
      <ejb-jar>
      Profile CMP
      <display-name>MDBean</display-name>

      <enterprise-beans>


      <ejb-name>EventBean</ejb-name>
      <local-home>com.inquent.iqos.ejb.Profile.EventLocalHome</local-home>
      com.inquent.iqos.ejb.Profile.EventLocal
      <ejb-class>com.inquent.iqos.ejb.Profile.EventBean</ejb-class>
      <persistence-type>Container</persistence-type>
      <prim-key-class>java.lang.Integer</prim-key-class>
      False
      <cmp-version>2.x</cmp-version>
      <abstract-schema-name>ProcEvent</abstract-schema-name>
      <cmp-field>
      <field-name>eventID</field-name>
      </cmp-field>
      <cmp-field>
      <field-name>eventName</field-name>
      </cmp-field>
      <primkey-field>eventID</primkey-field>



      <ejb-name>ProfileBean</ejb-name>
      <local-home>com.inquent.iqos.ejb.Profile.ProfileLocalHome</local-home>
      com.inquent.iqos.ejb.Profile.ProfileLocal
      com.inquent.iqos.ejb.Profile.ProfileHome
      com.inquent.iqos.ejb.Profile.ProfileRemote
      <ejb-class>com.inquent.iqos.ejb.Profile.ProfileBean</ejb-class>
      <persistence-type>Container</persistence-type>
      <prim-key-class>com.inquent.iqos.ejb.Profile.ProfilePK</prim-key-class>
      False
      <cmp-version>2.x</cmp-version>
      <abstract-schema-name>ProcEventProfile</abstract-schema-name>
      <cmp-field>
      <field-name>permissionID</field-name>
      </cmp-field>
      <cmp-field>
      <field-name>profileCondition</field-name>
      </cmp-field>
      <cmp-field>
      <field-name>eventID</field-name>
      </cmp-field>
      <cmp-field>
      <field-name>order</field-name>
      </cmp-field>

      <query-method>
      <method-name>findProfiles</method-name>
      <method-params>
      <method-param>int</method-param>
      </method-params>
      </query-method>
      <ejb-ql>
      </ejb-ql>


      <ejb-local-ref>
      <ejb-ref-name>ejb/EventBean</ejb-ref-name>
      <ejb-ref-type>Entity</ejb-ref-type>
      <local-home>com.inquent.iqos.ejb.Profile.EventLocalHome</local-home>
      com.inquent.iqos.ejb.Profile.EventLocal
      <ejb-link>EventBean</ejb-link>
      </ejb-local-ref>

      </enterprise-beans>

      <assembly-descriptor>
      <container-transaction>

      <ejb-name>ProfileBean</ejb-name>
      <method-name>*</method-name>


      <ejb-name>EventBean</ejb-name>
      <method-name>*</method-name>

      <trans-attribute>Supports</trans-attribute>
      </container-transaction>
      </assembly-descriptor>

      </ejb-jar>



      Does anybody know anything about this problem? Is this a known-bug or am I doing something wrong?
      I don't have this problem with session beans, they are correctly redeployed. Only entity beans return ClassCastException during redeployment.

      Thanks a lot for your help

        • 1. Re: EJB redeployment : ClassCastException
          Michael Remijan Newbie

          Sorry, I don't have a solution, I just wanted to report I'm also getting ClassCastException's. I'm doing something completely different than you, but I think it might be a result of the same problem. I've gotten ClassCastException, Linkage errors, Instances of classes being shared between ears. But everything works fine for me in 2.4.6. The ClassLoader in 3.0.4 really seems to be messed up.