@Stateful x @Stateless Erro EJB3

Quando uso a anotação @Stateful em um bean, ele me retorna essa exceção:

20:37:36,361 ERROR [STDERR] java.lang.ClassCastException: $Proxy169
20:37:36,362 ERROR [STDERR] at web.ejb3inaction.actionbazaar.client.PlaceOrderClient.doGet(PlaceOrderClient.java:25)
20:37:36,362 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
20:37:36,362 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
20:37:36,362 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
20:37:36,362 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
20:37:36,362 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
20:37:36,362 ERROR [STDERR] at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
20:37:36,362 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
20:37:36,363 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
20:37:36,363 ERROR [STDERR] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
20:37:36,363 ERROR [STDERR] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
20:37:36,363 ERROR [STDERR] at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
20:37:36,363 ERROR [STDERR] at java.lang.Thread.run(Thread.java:595)

Alguma dica?

Como vc está acessando seu EJB ?

Me parece que:

  1. Vc está tentando acessá-lo diretamente sem o look-up.
  2. Vc está fazendo cast de EJBs diferentes.

Poste aqui o código que gera o erro

Ao fazer o deploy do .ear, estava adicionando a interface no .war (web) e no .jar (ejb). Isso ocasinou o problema.