Dear experts, I have an EAR containing some jar files (one with interfaces and POJOs, one with Session Beans, ...), which is correctly deployed and
working in JBoss 5, and I'm trying to access some of the Session Beans methods from a separate WAR , which contains GWT based application.

I did a test using the WAR deployed in hosted mode (with the tomcat delivered by GWT) , and I managed (putting the needed jar with the
interfaces + the jboss client jars in the CLASSPATH) to access the session beans from the REMOTE interface.

Now I'm trying to test the same but deploying the war inside JBoss 5, and I'm having lots of problems related to (I think) classloading issues.

I read several posts on the forum, but I did not manage to succeed, while a similar application was working in Jboss 4.2.2.

Just to summarize what I have in the WAR :
there is a WEB-INF/lib containing only gwt-servlet.jar
there is a WEB-INF/web.xml containing servlet definitions
there is a WEB-INF/classes containing all the code
there is the stuff generated by GWT...
I also have a jndi.properties at the root level of the WAR, containing some
parameters for jndi :

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=jnp://dapmcf121:1099
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
client.method=local
web.host.url=http://dapmcf121:8080

and here is where I try to retrieve the interface :

if (clientmethod.equals("local")) {
 log.info("Getting local stub using jndi");
 InitialContext ctx = new InitialContext();
 tagDAO = (AligntagBD) ctx.lookup(SERVER_NAME
 + "/AligntagBDBean/local");
}

(in case it helps...)

I did try to set in file deployers/jbossweb.deployer/META-INF/war-deployers-jboss-beans.xml the parameter useJBossWebLoader=true
but nothing changed in the error message which is the following:

11:05:45,757 ERROR [STDERR] java.lang.Exception: javax.naming.NamingException: Could not dereference object [Root exception is java.lang.RuntimeException: Can not find interface declared by Proxy in our CL + org.jboss.web.tomcat.service.WebCtxLoader$ENCLoader@2db555]
11:05:45,758 ERROR [STDERR] at align.gwt.monitor.server.impl.AlignMonitoringSvcImpl.initTagDAO(AlignMonitoringSvcImpl.java:137)
11:05:45,758 ERROR [STDERR] at align.gwt.monitor.server.impl.AlignMonitoringSvcImpl.getTags(AlignMonitoringSvcImpl.java:203)
11:05:45,758 ERROR [STDERR] at align.gwt.monitor.server.impl.AlignMonitoringSvcImpl.getTags(AlignMonitoringSvcImpl.java:326)
11:05:45,758 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
11:05:45,758 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
11:05:45,758 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
11:05:45,758 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
11:05:45,758 ERROR [STDERR] at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
11:05:45,758 ERROR [STDERR] at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
11:05:45,758 ERROR [STDERR] at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
11:05:45,758 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
11:05:45,758 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
11:05:45,758 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
11:05:45,758 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
11:05:45,758 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
11:05:45,758 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
11:05:45,758 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
11:05:45,758 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
11:05:45,759 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
11:05:45,759 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
11:05:45,759 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
11:05:45,759 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
11:05:45,759 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
11:05:45,759 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
11:05:45,759 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
11:05:45,759 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
11:05:45,759 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
11:05:45,759 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
11:05:45,759 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
11:05:45,759 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
11:05:45,759 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
11:05:45,759 ERROR [STDERR] at java.lang.Thread.run(Thread.java:613)
11:05:45,759 ERROR [STDERR] Caused by: javax.naming.NamingException: Could not dereference object [Root exception is java.lang.RuntimeException: Can not find interface declared by Proxy in our CL + org.jboss.web.tomcat.service.WebCtxLoader$ENCLoader@2db555]
11:05:45,759 ERROR [STDERR] at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1463)
11:05:45,759 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:809)
11:05:45,759 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:673)
11:05:45,759 ERROR [STDERR] at javax.naming.InitialContext.lookup(InitialContext.java:351)
11:05:45,760 ERROR [STDERR] at align.gwt.monitor.server.impl.AlignMonitoringSvcImpl.initTagDAO(AlignMonitoringSvcImpl.java:125)
11:05:45,760 ERROR [STDERR] ... 31 more
11:05:45,760 ERROR [STDERR] Caused by: java.lang.RuntimeException: Can not find interface declared by Proxy in our CL + org.jboss.web.tomcat.service.WebCtxLoader$ENCLoader@2db555
11:05:45,760 ERROR [STDERR] at org.jboss.ejb3.proxy.objectfactory.ProxyObjectFactory.redefineProxyInTcl(ProxyObjectFactory.java:341)
11:05:45,760 ERROR [STDERR] at org.jboss.ejb3.proxy.objectfactory.session.SessionProxyObjectFactory.createProxy(SessionProxyObjectFactory.java:134)
11:05:45,760 ERROR [STDERR] at org.jboss.ejb3.proxy.objectfactory.session.stateless.StatelessSessionProxyObjectFactory.getProxy(StatelessSessionProxyObjectFactory.java:79)
11:05:45,761 ERROR [STDERR] at org.jboss.ejb3.proxy.objectfactory.ProxyObjectFactory.getObjectInstance(ProxyObjectFactory.java:156)
11:05:45,761 ERROR [STDERR] at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
11:05:45,761 ERROR [STDERR] at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1438)
11:05:45,761 ERROR [STDERR] at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1455)
11:05:45,761 ERROR [STDERR] ... 35 more
11:05:45,761 ERROR [STDERR] Caused by: java.lang.ClassNotFoundException: asap.server.io.dao.AligntagBDLocal
11:05:45,761 ERROR [STDERR] at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
11:05:45,761 ERROR [STDERR] at java.security.AccessController.doPrivileged(Native Method)
11:05:45,761 ERROR [STDERR] at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
11:05:45,761 ERROR [STDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
11:05:45,761 ERROR [STDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
11:05:45,761 ERROR [STDERR] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
11:05:45,761 ERROR [STDERR] at java.lang.Class.forName0(Native Method)
11:05:45,761 ERROR [STDERR] at java.lang.Class.forName(Class.java:242)
11:05:45,761 ERROR [STDERR] at org.jboss.ejb3.proxy.objectfactory.ProxyObjectFactory.redefineProxyInTcl(ProxyObjectFactory.java:337)
11:05:45,761 ERROR [STDERR] ... 41 more
11:05:45,762 ERROR [[/AlignGWTConsole]] Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.extjs.gxt.ui.client.data.PagingLoadResult align.gwt.monitor.client.services.AlignMonitoringSvc.getTags(java.lang.String,com.extjs.gxt.ui.client.data.PagingLoadConfig)' threw an unexpected exception: java.lang.NullPointerException
 at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360)
 at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546)
 at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
 at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
 at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
 at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Thread.java:613)
Caused by: java.lang.NullPointerException
 at align.gwt.monitor.server.impl.AlignMonitoringSvcImpl.getTags(AlignMonitoringSvcImpl.java:354)
 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 com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
 ... 24 more

Please tell me if you have any hints to debug this, I'm not an expert in classloading and I'm a little bit lost...
Andrea