java.lang.IllegalStateException

    at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:407)

    at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.sendErrorResponse(DefaultDispatcherErrorHandler.java:80)

    at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.handleError(DefaultDispatcherErrorHandler.java:59)

    at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:912)

    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:576)

    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)

    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)

    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)

    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

    at java.lang.Thread.run(Unknown Source)