The issue is that a ThreadLocal variable used with spring security does not contain the correct value any more and the war application exits.

The dependencies for the ear are configured with this xml:

<jboss-deployment-structure>
   <deployment>
      <dependencies>
        <module name="org.jboss.ws.saaj-impl" export="true"/>
        <module name="com.sun.xml.messaging.saaj" export="true"/>
        <module name="javax.xml.soap.api"  export="true"/>
        <module name="org.apache.xerces" services="import"  export="true"/>      
        <module name="org.jboss.ironjacamar.jdbcadapters"/>
         <module name="com.myfw" slot="4.2.3" export="true" meta-inf="export"> 
           <imports>
              <include path="META-INF**"/>
              <exclude path="com/myfw/security**"/>
           </imports>
        </module>
         <module name="org.hibernate" slot="3.6.9"> 
           <imports>
              <include path="META-INF**"/>
           </imports>
        </module>
        <module name="org.springframework.spring" slot="3.0.5-1" export="true" meta-inf="export">
           <imports>
              <include path="META-INF**"/>
           </imports>
        </module>
        <module name="org.springframework.ws" slot="2.0.3" export="true" meta-inf="export">
           <imports>
              <include path="META-INF**"/>
           </imports>
        </module>     
        <module  name="org.apache.commons.beanutils-core" slot="1.8.3" export="true"/>
        <module  name="org.apache.commons.collections" slot="3.2.1"  export="true"/>
        <module  name="org.apache.commons.logging" slot="1.1.1" export="true"/>
        <module  name="org.apache.commons.pool" slot="1.5.6" export="true"/>
        <module  name="org.aspectj" slot="1.6.10" export="true"/>
    </dependencies>
   </deployment>
   <sub-deployment name="security-sc-server-webservice.war">
     <dependencies>
        <module name="org.springframework.spring" slot="3.0.5-1" export="true" meta-inf="export">
           <imports>
              <include path="META-INF**"/>
           </imports>
        </module>
        <module name="org.springframework.ws" slot="2.0.3" export="true" meta-inf="export">
           <imports>
              <include path="META-INF**"/>
           </imports>
        </module>     
     </dependencies>
   </sub-deployment>
</jboss-deployment-structure>

The dependencies for the war application are similar but without the sub-deployment section.

The modules also have dependencies to each other.

The problem also occurs in the latest versions: wildfly-8.0.0.Beta1 and jboss-eap-6.2.0.Beta.

When I add the war into the ear and move all jars from the war WEB-INF/lib into the ear/lib folder the error mentioned above does not occur (even if the ear deployment uses module dependencies for the other libraries). However this is only a workaround and not the desired solution.