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

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This exception has no message.
java.lang.NullPointerException: 	at org.apache.struts.action.ActionServlet.initApplication(ActionServlet.java:1031)	at org.apache.struts.action.ActionServlet.init(ActionServlet.java:464)	at javax.servlet.GenericServlet.init(GenericServlet.java:258)	at weblogic.servlet.internal.ServletStubImpl$ServletInitAction.run(ServletStubImpl.java:1070)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:97)	at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl.java:893)	at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImpl.java:842)	at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:782)	at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:3191)	at weblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServletContext.java:3136)	at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:3109)	at weblogic.servlet.internal.WebAppServletContext.setStarted(WebAppServletContext.java:5559)	at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:853)	at weblogic.j2ee.J2EEApplicationContainer.start(J2EEApplicationContainer.java:2012)	at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2053)