[jboss-user] [EJB 3.0] New message: "Calling EJB from servlet - EJB's interface class not found"

Mike Johnson do-not-reply at jboss.com
Wed Jan 20 15:47:00 EST 2010

User development,

A new message was posted in the thread "Calling EJB from servlet - EJB's interface class not found":


Author  : Mike Johnson
Profile : http://community.jboss.org/people/micjohnson997

I have deployed several EJBs into an EAR on JBoss 6.0.0 M1.  I then have a separate WAR (not deployed inside the EAR) with a servlet that uses InitialContext.lookup() on the remote name of the EJB.  When doing this, I get a ClassNotFoundException for the interface class, even though the interface class is inside a JAR in the WAR's WEB-INF/lib directory. Here's the start of the stack trace:
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 at efdd6a]
     at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1508)
     at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:824)
     at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:688)
     at javax.naming.InitialContext.lookup(InitialContext.java:392)
then of course there's a bunch more stuff, followed by:
Caused by: java.lang.ClassNotFoundException: <My interface class name>
     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:247)
     at org.jboss.ejb3.proxy.impl.objectfactory.ProxyObjectFactory.redefineProxyInTcl(ProxyObjectFactory.java:406)
I've seen several posts talking about potential classloader issues, but I'm not familiar with the JBoss class loading scheme, so I was hoping someone had written up some good directions on how to correctly configure everything for calling an EJB from a WAR. 
Thanks in advance,
Mike Johnson


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