Hello Yan, you would have missed some configurations in cas.properties. Please share properties so that can we can review and let you know the issue.
Thanks Seshu On 5 January 2017 at 20:17, Yan Zhou <yanand...@gmail.com> wrote: > Hello, > > When you submit CAS4 login page, sometimes you got “Decode flow execution > error”. For a long time, I have been struggling as to why this happens. I > think we have an answer. > > > This most likely happens in a cluster environment when you have multiple > active CAS4 servers. They each has a different signing key. The webflow > values are encrypted by the CAS server handling request and sent back to CAS > login form, when form is submitted, the encrypted value comes back to CAS > server. Without session affinity, one server can sign the data, but the > other server won’t decrypt it, because the keys are different. > > > > That is my theory, do you think that would cause this error? I did verify > that when server cannot decrypt data, it results in null value, which causes > the following exception. > > > 2016-11-23 15:21:01,746 ERROR [org.jasig.cas.util.BinaryCipherExecutor] - > Unable to correctly extract the Initialization Vector or ciphertext. > > org.apache.shiro.crypto.CryptoException: Unable to correctly extract the > Initialization Vector or ciphertext. > > at > org.apache.shiro.crypto.JcaCipherService.decrypt(JcaCipherService.java:378) > > at > org.jasig.cas.util.BinaryCipherExecutor.decode(BinaryCipherExecutor.java:120) > > at > org.jasig.cas.util.BinaryCipherExecutor.decode(BinaryCipherExecutor.java:42) > > at > org.jasig.cas.web.flow.CasWebflowCipherBean.decrypt(CasWebflowCipherBean.java:58) > > at > org.jasig.spring.webflow.plugin.EncryptedTranscoder.decode(EncryptedTranscoder.java:105) > > at > org.jasig.spring.webflow.plugin.ClientFlowExecutionRepository.getFlowExecution(ClientFlowExecutionRepository.java:90) > > at > org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:168) > > at > org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:228) > > at > org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) > > at > org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) > > at > org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967) > > at > org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869) > > at javax.servlet.http.HttpServlet.service(Unknown Source) > > at > org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843) > > at javax.servlet.http.HttpServlet.service(Unknown Source) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown > Source) > > at org.apache.tomcat.websocket.server.WsFilter.doFilter(Unknown > Source) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown > Source) > > at > org.jasig.cas.security.ResponseHeadersEnforcementFilter.doFilter(ResponseHeadersEnforcementFilter.java:227) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > > > at > org.jasig.cas.security.RequestParameterPolicyEnforcementFilter.doFilter(RequestParameterPolicyEnforcementFilter.java:250) > > at > org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344) > > at > org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown > Source) > > at > org.jasig.inspektr.common.web.ClientInfoThreadLocalFilter.doFilter(ClientInfoThreadLocalFilter.java:62) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown > Source) > > at > org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85) > > at > org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) > > at > org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344) > > at > org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261) > > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown > Source) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown > Source) > > at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown > Source) > > at org.apache.catalina.core.StandardContextValve.invoke(Unknown > Source) > > at > org.apache.catalina.authenticator.AuthenticatorBase.invoke(Unknown Source) > > at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) > > at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown > Source) > > at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source) > > at org.apache.catalina.valves.RemoteIpValve.invoke(Unknown Source) > > at org.apache.catalina.core.StandardEngineValve.invoke(Unknown > Source) > > at org.apache.catalina.connector.CoyoteAdapter.service(Unknown > Source) > > at org.apache.coyote.http11.AbstractHttp11Processor.process(Unknown > Source) > > at > org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(Unknown > Source) > > at > org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(Unknown Source) > > at > org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(Unknown Source) > > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(Unknown > Source) > > at java.lang.Thread.run(Thread.java:745) > > Caused by: java.lang.NullPointerException > > at java.lang.System.arraycopy(Native Method) > > at > org.apache.shiro.crypto.JcaCipherService.decrypt(JcaCipherService.java:370) > > ... 53 more > > > > > Thx, > > Yan > > -- > - CAS gitter chatroom: https://gitter.im/apereo/cas > - CAS mailing list guidelines: > https://apereo.github.io/cas/Mailing-Lists.html > - CAS documentation website: https://apereo.github.io/cas > - CAS project website: https://github.com/apereo/cas > --- > You received this message because you are subscribed to the Google Groups > "CAS Community" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to cas-user+unsubscr...@apereo.org. > To view this discussion on the web visit > https://groups.google.com/a/apereo.org/d/msgid/cas-user/765dfc4c-70bd-4141-bf87-8c1c983fff92%40apereo.org. -- Venkata S Sadhu India (Mobile) : +91 9850438062 USA (VOIP) : +1 330 984 0330 Pune Maharastra INDIA -- - CAS gitter chatroom: https://gitter.im/apereo/cas - CAS mailing list guidelines: https://apereo.github.io/cas/Mailing-Lists.html - CAS documentation website: https://apereo.github.io/cas - CAS project website: https://github.com/apereo/cas --- You received this message because you are subscribed to the Google Groups "CAS Community" group. To unsubscribe from this group and stop receiving emails from it, send an email to cas-user+unsubscr...@apereo.org. To view this discussion on the web visit https://groups.google.com/a/apereo.org/d/msgid/cas-user/CAABZGc1o-UQSVktF%3D18RSv4sZKZTOwcv7uE4qahkoyA6GYRkLQ%40mail.gmail.com.
