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javax.servlet.UnavailableException at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:1169) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:473) at javax.servlet.GenericServlet.init(GenericServlet.java:211) at servletunit.struts.MockStrutsTestCase.getActionServlet(MockStrutsTestCase.java:326)