Сбой приложения в Weblogic 12

Я развернул приложение GWT в Weblogic 10. Оно работает нормально, но когда я развертываю его в Weblogic 12, вызов RPC не работает, показывая ошибку «Ошибка при отправке вызова RPC».

Это ошибка, которую мы получаем, но у нас нет финальных классов:

java.lang.VerifyError: Cannot inherit from final class
            at java.lang.ClassLoader.defineClass1(Native Method)
            at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
            at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
            at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:385)
            at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:344)
            at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:302)
            at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:64)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
            at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:180)
            at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:43)
            at java.lang.Class.forName0(Native Method)
            at java.lang.Class.forName(Class.java:270)
            at com.google.gwt.user.server.rpc.SerializationPolicyLoader.loadFromStream(SerializationPolicyLoader.java:196)
            at com.google.gwt.user.server.rpc.RemoteServiceServlet.loadSerializationPolicy(RemoteServiceServlet.java:93)
            at com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:352)
            at com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:206)
            at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:505)
            at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:240)
            at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:263)
            at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:305)
            at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
            at javax.servlet.http.HttpServlet.service(HttpServlet.java:751)
            at javax.servlet.http.HttpServlet.service(HttpServlet.java:844)
            at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:280)
            at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:254)
            at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:136)
            at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:341)
            at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:238)
            at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3376)
            at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3346)
            at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
            at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
            at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
            at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2230)
            at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2146)
            at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2124)
            at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1564)
            at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
            at weblogic.work.ExecuteThread.execute(ExecuteThread.java:312)
            at weblogic.work.ExecuteThread.run(ExecuteThread.java:264)

ошибка:

Ошибка вызова на сервере, см. журналы сервера (ошибка 500)