No EJBs found in the ejb-jar file

Hello all, we are thinking about migrating from JBoss to WebLogic server, so as a proof of concept I am trying to migrate a JBoss Seam web application to WebLogic server.
I have followed all the instructions here: http://docs.jboss.org/seam/2.0.2.SP1/reference/en-US/html/weblogic.html and I have set up ebvryhting that is needed in order to start the server (JMS queues, datasources, etc) but when the server starts and tries to load the web application I got the following error message
<29 ═Ύί 2010 4:34:51 ΉΉ EET> <Error> <Deployer> <BEA-149205> <Failed to initialize the application 'myapplication-ear' due to error weblogic.application.ModuleException: Exception preparing module
: EJBModule(MyApplication.jar)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
No EJBs found in the ejb-jar file 'MyApplication.jar'. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with t
he @Stateless, @Stateful or @MessageDriven EJB annotation...
weblogic.application.ModuleException: Exception preparing module: EJBModule(MyApplication.jar)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
No EJBs found in the ejb-jar file 'MyApplication.jar'. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with t
he @Stateless, @Stateful or @MessageDriven EJB annotation..
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:467)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:507)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:41)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:149)
Truncated. see log file for complete stacktrace
Caused By: java.io.IOException: No EJBs found in the ejb-jar file 'MyApplication.jar'. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at l
east one class annotated with the @Stateless, @Stateful or @MessageDriven EJB annotation.
at weblogic.ejb.container.dd.xml.EjbDescriptorReaderImpl.createReadOnlyDescriptorFromJarFile(EjbDescriptorReaderImpl.java:219)
at weblogic.ejb.spi.EjbDescriptorFactory.createReadOnlyDescriptorFromJarFile(EjbDescriptorFactory.java:93)
at weblogic.ejb.container.deployer.EJBModule.loadEJBDescriptor(EJBModule.java:1242)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:395)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
Truncated. see log file for complete stacktrace
The MyApplication.jar is where we keep all the models and we are using an exploded folder for the ear file. We have declared all the classes to be entities by using the @Entity and @Table annotations and we have also defined an interceptor in the ejb-jar.xml file (shown below).
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd"
version="3.0">
<interceptors>
<interceptor>
<interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
</interceptor>
</interceptors>
<assembly-descriptor>
<interceptor-binding>
<ejb-name>*</ejb-name>
<interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
</interceptor-binding>
</assembly-descriptor>
</ejb-jar>
I have tried to compile everythign from scratch by using weblogic.appc but I am getting the same error: No EJBs found in the ejb-jar file 'ejbModule'. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with the @Stateless, @Stateful or @MessageDriven EJB annotation.
Any ideas what is going on and how I can resolve the issue?
Regards
Panos
Edited by: 816483 on 29 Νοε 2010 6:53 πμ

Hi John,
I am working on development an enterprise application using EJB 3.0 on Weblogic 10.
While developing, I am keeping all my classes (from ejb's as well as web) into APP-INF/classes directory. It is working fine for Web and ejb 2.0 packages, but ejb 3.0 packages, I get the following error when I keep my ejb 3.0 beans classes in APP-INF/classes directory.
No EJBs found in the ejb-jar file 'customer'. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with the @Stateless, @Stateful or @MessageDriven EJB annotation.
One solution is to keep the classes under customer ejb directory, but I wan tto keep all the classes in APP-INF/classes directory so that when using Eclipse IDE I can output all compiled sources into APP-INF/classes directory.
Has anyone faced this situation? Any suggestions to fix this issue?

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