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 javax.servlet.GenericServlet.init(GenericServlet.java:258)
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.j2ee.J2EEApplicationContainer.start(J2EEApplicationContainer.java:2012)
at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2053)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.activateContainer(SlaveDeployer.java:2558)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.doCommit(SlaveDeployer.java:2483)
at weblogic.management.deploy.slave.SlaveDeployer$Task.commit(SlaveDeployer.java:2308)
at weblogic.management.deploy.slave.SlaveDeployer.commitUpdate(SlaveDeployer.java:639)
at weblogic.drs.internal.SlaveCallbackHandler$2.execute(SlaveCallbackHandler.java:35)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:178)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:151)

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