ClassCastException when redeploying ear file

[velpsamy]

I am running with jboss-3.2.1_tomcat-4.1.24 connecting to Oracle 8i.

I have an ear file which contains a jar (with a simple ejb) and a war file.

I use data transfer objects and those classes are *only* packaged in the ejb jar.

Everything works fine until I redeploy the ear file.

When I redeploy the ear file, it gives me classcastexception in the dao layer (called from ejb).

I even tried adding <loader-repository> tag in jboss-app.xml. It doesn't work.

If I restart Jboss it works. But I don't want to do that everytime I redeploy.

Any suggestions?

[stefanfreyr]

What's the stack trace you're getting?

[velpsamy]

16:58:04,708 ERROR [STDERR] java.lang.ClassCastException
16:58:04,718 ERROR [STDERR] at sample1.dao.cocobase.CBLocalSampleDAO.getNumber(CBLocalSampleDAO.
java:193)
16:58:04,728 ERROR [STDERR] at sample1.ejb.SampleBean.getNumber(SampleBean.java:126)
16:58:04,728 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
16:58:04,738 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorI
mpl.java:39)
16:58:04,748 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodA
ccessorImpl.java:25)
16:58:04,758 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
16:58:04,758 ERROR [STDERR] at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invo
ke(StatelessSessionContainer.java:629)
16:58:04,768 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.
invoke(CachedConnectionInterceptor.java:186)
16:58:04,778 ERROR [STDERR] at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(
StatelessSessionInstanceInterceptor.java:72)
16:58:04,788 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTx
Interceptor.java:84)
16:58:04,798 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInte
rceptorCMT.java:243)
16:58:04,798 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.ja
va:104)
16:58:04,808 ERROR [STDERR] at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityIntercep
tor.java:117)
16:58:04,818 ERROR [STDERR] at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:1
91)
16:58:04,828 ERROR [STDERR] at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyF
actoryFinderInterceptor.java:122)
16:58:04,838 ERROR [STDERR] at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessS
essionContainer.java:322)
16:58:04,838 ERROR [STDERR] at org.jboss.ejb.Container.invoke(Container.java:674)
16:58:04,848 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
16:58:04,848 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorI
mpl.java:39)
16:58:04,858 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodA
ccessorImpl.java:25)
16:58:04,868 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
16:58:04,868 ERROR [STDERR] at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(Reflected
MBeanDispatcher.java:284)
16:58:04,878 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:5
49)
16:58:04,888 ERROR [STDERR] at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:
101)
16:58:04,898 ERROR [STDERR] at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor
.java:83)
16:58:04,908 ERROR [STDERR] at org.jboss.proxy.TransactionInterceptor.invoke(TransactionIntercep
tor.java:46)
16:58:04,908 ERROR [STDERR] at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.ja
va:45)
16:58:04,918 ERROR [STDERR] at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessS
essionInterceptor.java:100)
16:58:04,928 ERROR [STDERR] at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85)
16:58:04,928 ERROR [STDERR] at $Proxy41.getNumber(Unknown Source)
16:58:04,938 ERROR [STDERR] at sample1.delegates.SampleDelegate.getNumber(SampleDelegate.java:11
1)
16:58:04,948 ERROR [STDERR] at sample1.web.struts.action.EditNumberAction.execute(EditNumberActi
on.java:40)
16:58:04,948 ERROR [STDERR] at org.apache.struts.action.RequestProcessor.processActionPerform(Re
questProcessor.java:484)
16:58:04,958 ERROR [STDERR] at org.apache.struts.action.RequestProcessor.process(RequestProcesso
r.java:274)
16:58:04,968 ERROR [STDERR] at org.apache.struts.action.ActionServlet.process(ActionServlet.java
:1482)
16:58:04,978 ERROR [STDERR] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:5
07)
16:58:04,988 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
16:58:04,988 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
16:58:04,998 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(
ApplicationFilterChain.java:247)
16:58:04,998 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(Applicat
ionFilterChain.java:193)
16:58:05,008 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrap
perValve.java:256)
16:58:05,018 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:643)
16:58:05,028 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline
.java:480)
16:58:05,028 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
995)
16:58:05,038 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardCont
extValve.java:191)
16:58:05,048 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:643)
16:58:05,058 ERROR [STDERR] at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesV
alve.java:246)
16:58:05,068 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:641)
16:58:05,078 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline
.java:480)
16:58:05,088 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
995)
16:58:05,088 ERROR [STDERR] at org.apache.catalina.core.StandardContext.invoke(StandardContext.j
ava:2415)
16:58:05,098 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostVal
ve.java:180)
16:58:05,108 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:643)
16:58:05,118 ERROR [STDERR] at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispa
tcherValve.java:171)
16:58:05,118 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:641)
16:58:05,128 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportVal
ve.java:172)
16:58:05,138 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:641)
16:58:05,148 ERROR [STDERR] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.j
ava:509)
16:58:05,158 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:641)
16:58:05,158 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline
.java:480)
16:58:05,168 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
995)
16:58:05,178 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngin
eValve.java:174)
16:58:05,188 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveCo
ntext.invokeNext(StandardPipeline.java:643)
16:58:05,198 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline
.java:480)
16:58:05,198 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
995)
16:58:05,208 ERROR [STDERR] at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.jav
a:223)
16:58:05,218 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.
java:594)
16:58:05,228 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.p
rocessConnection(Http11Protocol.java:392)
16:58:05,238 ERROR [STDERR] at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.
java:565)
16:58:05,238 ERROR [STDERR] at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(Thr
eadPool.java:619)
16:58:05,248 ERROR [STDERR] at java.lang.Thread.run(Thread.java:536)

[frito]

After redeploying, one of the .ear, someone in your .war is probably holding a reference to an object which is now redeployed (and loaded from a different classloader, therefore a different resource).

If you are using two different loader repositories with java2parent delegation = false, deploying the transport object in both deployments, the check is done by serialization, which should work for resources with the same serial version id. This works with EJBs, I hope even with .wars, since the webserver is using its own classloaders.

Redeploying even the "dependent" deployments should work at all ;-)

Greetings,
Frito

[velpsamy]

Thanks for your response.

Could you please elaborate on that? I am not quite getting what i should try.

Thanks

[adrian.brock]

Your problem is almost certainly struts storing objects
in global maps that are still around after a redeploy.
I've seen this before. I thought it had been fixed in struts1.1?

Get a memory profiler and locate what is holding
onto the class object after a redeploy.

Regards,
Adrian (not a struts user)