> org.jasig.cas.client.util.CommonUtils.getResponseFromServer(CommonUtils.java:295)
>          at
> org.jasig.cas.client.validation.AbstractCasProtocolUrlBasedTicketValidator.retrieveResponseFromServer(AbstractCasProtocolUrlBasedTicketValidator.java:33)
>          at
> org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:178)
>          at
> org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:132)
>          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:127)
>          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:291)
>          at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
>          at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
>          at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>          at java.lang.Thread.run(Thread.java:636)
> Caused by: java.net.ConnectException: Connection refused
>          at java.net.PlainSocketImpl.socketConnect(Native Method)
>          at
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
>          at
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
>          at
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
>          at
>          java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
>          at java.net.Socket.connect(Socket.java:546)
>          at java.net.Socket.connect(Socket.java:495)
>          at sun.net.NetworkClient.doConnect(NetworkClient.java:178)
>          at
>          sun.net.www.http.HttpClient.openServer(HttpClient.java:409)
>          at
>          sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
>          at sun.net.www.http.HttpClient.<init>(HttpClient.java:240)
>          at sun.net.www.http.HttpClient.New(HttpClient.java:321)
>          at sun.net.www.http.HttpClient.New(HttpClient.java:338)
>          at
> sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:935)
>          at
> sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:876)
>          at
> sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:801)
>          at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1139)
>          at
> org.jasig.cas.client.util.CommonUtils.getResponseFromServer(CommonUtils.java:281)
>          ... 15 more
