java.lang.ClassCastException: This exception has no message.

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java.lang.ClassCastException:
at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl.java:934)
at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImpl.java:879)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:819)
at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:2880)
at weblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServletContext.java:2825)
at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:2798)
at weblogic.servlet.internal.WebAppServletContext.setStarted(WebAppServletContext.java:5035)
at weblogic.j2ee.J2EEApplicationContainer.start(J2EEApplicationContainer.java:1106)
at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:1083)
at weblogic.management.deploy.slave.SlaveDeployer.setActivationStateForAllApplications(SlaveDeployer.java:665)
at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:395)
at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:242)
at weblogic.t3.srvr.ServerLifeCycleList.resume(ServerLifeCycleList.java:70)
at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:828)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:299)
at weblogic.Server.main(Server.java:32)

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