Hi, We have configured SAML SSO with one of the SP. Single Sign In is working fine. But when the user clicks sign out, we are redirecting the user to https://<GLUU-Host>/idp/profile/SAML2/Redirect/SLO it is throwing the below error in server (I've verified SP, that it supports redirect slo) Logout Request is ``` <samlp:LogoutRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="mindtouch_0f1d532b-79f6-405d-919d-409da7ce6ba5" Version="2.0" IssueInstant="2021-01-27T07:26:00Z" Destination="https://<IDP-Host>/idp/profile/SAML2/Redirect/SLO"> <saml:Issuer>saml://<SP-HOST>/2</saml:Issuer> <saml:NameID SPNameQualifier="saml://<SP-HOST>/2" Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">Mail</saml:NameID> <samlp:SessionIndex>_43c7cde79e255c5252c53adea658fbfc</samlp:SessionIndex> </samlp:LogoutRequest> ``` Browser Response: Bad Request. Your browser sent a request that this server could not understand. In gluu server below log is coming (in shibboleth) ``` 2021-01-27 07:26:00,914 - 49.205.217.105 - WARN [net.shibboleth.idp.profile.impl.WebFlowMessageHandlerAdaptor:197] - Profile Action WebFlowMessageHandlerAdaptor: Exception handling message org.opensaml.messaging.handler.MessageHandlerException: Message context was not authenticated at org.opensaml.messaging.handler.impl.CheckMandatoryAuthentication.doInvoke(CheckMandatoryAuthentication.java:70) ==> idp-warn.log <== 2021-01-27 07:26:00,914 - 49.205.217.105 - WARN [net.shibboleth.idp.profile.impl.WebFlowMessageHandlerAdaptor:197] - Profile Action WebFlowMessageHandlerAdaptor: Exception handling message org.opensaml.messaging.handler.MessageHandlerException: Message context was not authenticated at org.opensaml.messaging.handler.impl.CheckMandatoryAuthentication.doInvoke(CheckMandatoryAuthentication.java:70) at org.opensaml.messaging.handler.AbstractMessageHandler.invoke(AbstractMessageHandler.java:93) at net.shibboleth.idp.profile.impl.WebFlowMessageHandlerAdaptor.doExecute(WebFlowMessageHandlerAdaptor.java:195) at org.opensaml.profile.action.AbstractProfileAction.execute(AbstractProfileAction.java:112) at net.shibboleth.idp.profile.AbstractProfileAction.doExecute(AbstractProfileAction.java:150) at net.shibboleth.idp.profile.AbstractProfileAction.execute(AbstractProfileAction.java:122) at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51) at org.springframework.webflow.action.EvaluateAction.doExecute(EvaluateAction.java:77) at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:188) at org.springframework.webflow.execution.AnnotatedAction.execute(AnnotatedAction.java:145) at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51) at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:101) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Flow.start(Flow.java:527) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:368) at org.springframework.webflow.engine.impl.RequestControlContextImpl.start(RequestControlContextImpl.java:234) at org.springframework.webflow.engine.SubflowState.doEnter(SubflowState.java:101) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Transition.execute(Transition.java:228) at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:395) at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214) at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:116) at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:547) at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:390) at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210) at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:105) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Transition.execute(Transition.java:228) at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:395) at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214) at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:116) at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:547) at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:390) at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210) at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:105) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Flow.start(Flow.java:527) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:368) at org.springframework.webflow.engine.impl.RequestControlContextImpl.start(RequestControlContextImpl.java:234) at org.springframework.webflow.engine.SubflowState.doEnter(SubflowState.java:101) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Transition.execute(Transition.java:228) at org.springframework.webflow.engine.DecisionState.doEnter(DecisionState.java:51) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Transition.execute(Transition.java:228) at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:395) at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214) at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:116) at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:547) at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:390) at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210) at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:105) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Transition.execute(Transition.java:228) at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:395) at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214) at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:116) at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:547) at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:390) at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210) at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:105) at org.springframework.webflow.engine.State.enter(State.java:194) at org.springframework.webflow.engine.Flow.start(Flow.java:527) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:368) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:223) at org.springframework.webflow.executor.FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:139) at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:264) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder$NotAsyncServlet.service(ServletHolder.java:1411) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:763) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1651) at net.shibboleth.idp.log.SLF4JMDCServletFilter.doFilter(SLF4JMDCServletFilter.java:72) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1638) at net.shibboleth.utilities.java.support.net.RequestResponseContextFilter.doFilter(RequestResponseContextFilter.java:61) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1638) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1638) at net.shibboleth.utilities.java.support.net.CookieBufferingFilter.doFilter(CookieBufferingFilter.java:68) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1638) at net.shibboleth.utilities.java.support.net.SameSiteCookieHeaderFilter.doFilter(SameSiteCookieHeaderFilter.java:204) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1630) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:567) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:191) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.Server.handle(Server.java:501) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105) at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:375) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938) at java.base/java.lang.Thread.run(Thread.java:834) ```