Can't Access Remote EJB from Servlet

[jtorres]

Environment:
JDK 1.4.2_09
JBoss [Zion] 4.0.3SP1 (build: CVSTag=JBoss_4_0_3_SP1 date=200510231054)

Deployment 1:
A simple "hello world" Session EJB (ejb 2.1) deployed as an EJB jar.

Deployment 2:
A web application (Servlet 2.4) client that has a simple servlet that looks up the remote Session Bean and calls "printHelloWorld". This web app contains the EJB interfaces in a jar file in the /WEB-INF/lib

I'm getting a ClassCastException when I retrieve the Home interface (see below). Any suggestions on resolving this? I need to test a 2-tier deployment; EJB deployed in one server and the WebClient deployed to another physical tier.

TIA!

Specifically:
6:00:42,732 ERROR [[TestClientServlet]] Servlet.service() for servlet TestClientServlet threw exception
java.lang.ClassCastException
at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)
at test.TestClientServlet.doGet(TestClientServlet.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:552)

[jtorres]

The following are my descriptors:

For Web Client, snippet:

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
 <servlet>
 <display-name>TestClientServlet</display-name>
 <servlet-name>TestClientServlet</servlet-name>
 <servlet-class>test.TestClientServlet</servlet-class>

 </servlet>

...

 <servlet-mapping>
 <servlet-name>TestClientServlet</servlet-name>
 <url-pattern>/test</url-pattern>
 </servlet-mapping>

...
 <ejb-ref >
 <ejb-ref-name>ejb/HelloWorldBean</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <home>test.HelloWorldHome</home>
 <remote>test.HelloWorld</remote>
 </ejb-ref>

</web-app>

For EJB Client, snippet:

<enterprise-beans>
 <session >
 <description><![CDATA[A session bean named HelloWorld]]></description>
 <display-name>HelloWorld</display-name>

 <ejb-name>HelloWorld</ejb-name>

 <home>test.HelloWorldHome</home>
 <remote>test.HelloWorld</remote>
 <local-home>test.HelloWorldLocalHome</local-home>
 <local>test.HelloWorldLocal</local>
 <ejb-class>test.HelloWorldSession</ejb-class>
 <session-type>Stateless</session-type>
 <transaction-type>Container</transaction-type>

 </session>
</enterprise-beans>

Servlet Test Code:

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 try {
 InitialContext ctx = new InitialContext();
 Object ref = ctx.lookup("java:comp/env/ejb/HelloWorldBean");
 HelloWorldHome home = (HelloWorldHome)PortableRemoteObject.narrow(ref, HelloWorldHome.class);
 System.out.println("Test Servlet: received HelloWorldHome: "+home);
 HelloWorld hw = home.create();
 hw.printHelloWorld();
 } catch (Throwable t) {
 throw new ServletException(t);
 }
 }