title: Unable to load the EJB module error on deployment when Logback is used
body: <p>I am playing around with Java EE for the first time and I am able to get a hello world app to work with both a web client and console client calling an ejb. </p>
  
  <p>After I confirmed the code was working I added a logger using logback for logging purposes. Once I added the logger in my code I get the following error, if I remove logback the error goes away. </p>
  
  <p><strong>Is there any way I can have logback running on EJB's?</strong></p>
  
  <p>--Edit-- </p>
  
  <p>Apparently <strong>yes</strong>: <a href="http://logback.qos.ch/demo.html" rel="nofollow">The logback demo page</a> lists an example with a web application. </p>
  
  <p>--End Edit--</p>
  
  <p>As a side note: The only deployment that fails is web, a client console application works fine.  </p>
  
  <p>Error I am getting: </p>
  
  <pre><code>deploy?DEFAULT=C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\build\web&amp;name=WebInterface&amp;contextroot=/WebInterface&amp;force=true failed on GlassFish Server 3+ 
   Error occurred during deployment: Exception while preparing the app : Unable to load the EJB module. DeploymentContext does not contain any EJB. Check the archive to ensure correct packaging for C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\build\web.
  If you use EJB component annotations to define the EJB, and an ejb or web deployment descriptor is also used, please make sure that the deployment descriptor references a Java EE 5 or higher version schema, and that the metadata-complete attribute is not set to true, so the component annotations can be processed as expected. Please see server.log for more details.
  C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\nbproject\build-impl.xml:1060: The module has not been deployed.
  </code></pre>
  
  <p>Stack trace: </p>
  
  <pre><code>SEVERE: Exception while invoking class org.glassfish.ejb.startup.EjbDeployer prepare method
  SEVERE: Exception while preparing the app
  SEVERE: Unable to load the EJB module. DeploymentContext does not contain any EJB. Check the archive to ensure correct packaging for C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\build\web.
  If you use EJB component annotations to define the EJB, and an ejb or web deployment descriptor is also used, please make sure that the deployment descriptor references a Java EE 5 or higher version schema, and that the metadata-complete attribute is not set to true, so the component annotations can be processed as expected
  java.lang.RuntimeException: Unable to load the EJB module. DeploymentContext does not contain any EJB. Check the archive to ensure correct packaging for C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\build\web.
  If you use EJB component annotations to define the EJB, and an ejb or web deployment descriptor is also used, please make sure that the deployment descriptor references a Java EE 5 or higher version schema, and that the metadata-complete attribute is not set to true, so the component annotations can be processed as expected
      at org.glassfish.ejb.startup.EjbDeployer.prepare(EjbDeployer.java:201)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:871)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:410)
      at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
      at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:348)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:363)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1085)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:95)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1291)
      at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1259)
      at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:461)
      at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:212)
      at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179)
      at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
      at com.sun.enterprise.v3.services.impl.ContainerMapper$Hk2DispatcherCallable.call(ContainerMapper.java:354)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
      at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
      at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
      at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
      at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
      at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
      at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
      at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
      at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
      at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
      at java.lang.Thread.run(Thread.java:722)
  
  SEVERE: Exception while preparing the app : Unable to load the EJB module. DeploymentContext does not contain any EJB. Check the archive to ensure correct packaging for C:\Users\roberth\Programming_Projects\NetBeans\WebInterface\build\web.
  If you use EJB component annotations to define the EJB, and an ejb or web deployment descriptor is also used, please make sure that the deployment descriptor references a Java EE 5 or higher version schema, and that the metadata-complete attribute is not set to true, so the component annotations can be processed as expected
  </code></pre>