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

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java.lang.NoClassDefFoundError:
at com.sun.identity.agents.filter.URLPolicyTaskHandler.initialize(URLPolicyTaskHandler.java:63)
at com.sun.identity.agents.arch.ServiceFactory.getFilterInboundTaskHandlers(ServiceFactory.java:82)
at com.sun.identity.agents.filter.AmFilter.initInboundTaskHandlers(AmFilter.java:345)
at com.sun.identity.agents.filter.AmFilter.initialize(AmFilter.java:80)
at com.sun.identity.agents.arch.ServiceFactory.getAmFilter(ServiceFactory.java:154)
at com.sun.identity.agents.filter.AmFilterManager.getAmFilter(AmFilterManager.java:60)
at com.sun.identity.agents.filter.AmFilterManager.getAmFilterInstance(AmFilterManager.java:140)
at com.sun.identity.agents.filter.AmAgentBaseFilter.getAmFilterInstance(AmAgentBaseFilter.java:281)
at com.sun.identity.agents.filter.AmAgentBaseFilter.doFilter(AmAgentBaseFilter.java:64)
at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:58)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:384)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)

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