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    <p>Hi Xiaoshu,</p>
    <p>I do see the same exception in our Incommon midPoint testbed,
      though the login appears to proceed fine, I see the same exception
      logged at each login event. We are also using the httpHeader
      module to process a headers set by a Shibboleth SP.<br>
    </p>
    <p>Ethan</p>
    <p>2021-09-27 17:37:06,552 [MODEL] [ajp-nio-127.0.0.1-9090-exec-9]
      INFO
      (org.springframework.security.web.DefaultSecurityFilterChain):
      Creating filter chain: Ant [pattern='/auth/shib/httpHeader/**'],
      [org.springframework.security.web.header.HeaderWriterFilter@87b6f7,
      org.springframework.security.web.csrf.CsrfFilter@aece9cc,
com.evolveum.midpoint.web.security.filter.RedirectForLoginPagesWithAuthenticationFilter@2e822fcb,
com.evolveum.midpoint.web.security.filter.MidpointRequestHeaderAuthenticationFilter@5756d0c0,
org.springframework.security.web.authentication.logout.LogoutFilter@138f1343,
com.evolveum.midpoint.web.security.filter.MidpointUsernamePasswordAuthenticationFilter@7011378c,
org.springframework.security.web.savedrequest.RequestCacheAwareFilter@245a878c,
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@1093c981,
com.evolveum.midpoint.web.security.filter.MidpointAnonymousAuthenticationFilter@28d763a3,
com.evolveum.midpoint.web.security.filter.MidpointExceptionTranslationFilter@55dbf759,
org.springframework.security.web.access.intercept.FilterSecurityInterceptor@765d8718]<br>
      2021-09-27 17:37:06,703 [MODEL] [ajp-nio-127.0.0.1-9090-exec-9]
      ERROR
      (com.evolveum.midpoint.web.security.filter.TranslateExeptionFilter):
      Unable to handle the Spring Security Exception because the
      response is already committed.<br>
      javax.servlet.ServletException: Unable to handle the Spring
      Security Exception because the response is already committed.<br>
          at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:138)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAnonymousAuthenticationFilter.doFilter(MidpointAnonymousAuthenticationFilter.java:96)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:158)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointRequestHeaderAuthenticationFilter.doFilter(MidpointRequestHeaderAuthenticationFilter.java:65)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
com.evolveum.midpoint.web.security.filter.RedirectForLoginPagesWithAuthenticationFilter.doFilterInternal(RedirectForLoginPagesWithAuthenticationFilter.java:39)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:117)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:92)<br>
          at
org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:77)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter.doFilterInternal(MidpointAuthFilter.java:192)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter.doFilter(MidpointAuthFilter.java:100)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy$VirtualFilterChain.doFilter(MidpointFilterChainProxy.java:169)<br>
          at
com.evolveum.midpoint.web.security.filter.TranslateExeptionFilter.doFilterInternal(TranslateExeptionFilter.java:30)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy$VirtualFilterChain.doFilter(MidpointFilterChainProxy.java:171)<br>
          at
org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:152)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy$VirtualFilterChain.doFilter(MidpointFilterChainProxy.java:171)<br>
          at
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy$VirtualFilterChain.doFilter(MidpointFilterChainProxy.java:171)<br>
          at
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy$VirtualFilterChain.doFilter(MidpointFilterChainProxy.java:171)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy.doFilterInternal(MidpointFilterChainProxy.java:95)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointFilterChainProxy.doFilter(MidpointFilterChainProxy.java:60)<br>
          at
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)<br>
          at
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
com.evolveum.midpoint.web.boot.TrailingSlashRedirectingFilter.doFilterInternal(TrailingSlashRedirectingFilter.java:60)<br>
          at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br>
          at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br>
          at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)<br>
          at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)<br>
          at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)<br>
          at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)<br>
          at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)<br>
          at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)<br>
          at
com.evolveum.midpoint.web.boot.NodeIdHeaderValve.invoke(NodeIdHeaderValve.java:46)<br>
          at
com.evolveum.midpoint.web.boot.TomcatRootValve.invoke(TomcatRootValve.java:62)<br>
          at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)<br>
          at
      org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)<br>
          at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)<br>
          at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)<br>
          at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589)<br>
          at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)<br>
          at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)<br>
          at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)<br>
          at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)<br>
          at java.base/java.lang.Thread.run(Thread.java:834)<br>
      Caused by:
      org.springframework.security.access.AccessDeniedException: Not
      authorized<br>
          at
com.evolveum.midpoint.web.security.MidPointGuiAuthorizationEvaluator.decide(MidPointGuiAuthorizationEvaluator.java:203)<br>
          at
org.springframework.security.access.intercept.AbstractSecurityInterceptor.beforeInvocation(AbstractSecurityInterceptor.java:233)<br>
          at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:123)<br>
          at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90)<br>
          at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:353)<br>
          at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:118)<br>
          ... 80 common frames omitted<br>
      <br>
    </p>
    <div class="moz-cite-prefix">On 9/8/21 9:39 AM, Wang, Xiaoshu via
      midPoint wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:BL0PR03MB4243D54ABF17D69BB5462DD29CD49@BL0PR03MB4243.namprd03.prod.outlook.com">
      
      <meta name="Generator" content="Microsoft Word 15 (filtered
        medium)">
      <style>@font-face
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        panose-1:2 4 5 3 5 4 6 3 2 4;}@font-face
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        panose-1:2 1 6 0 3 1 1 1 1 1;}@font-face
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        panose-1:2 1 6 0 3 1 1 1 1 1;}p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        font-size:12.0pt;
        font-family:"Calibri",sans-serif;}span.EmailStyle17
        {mso-style-type:personal-compose;
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        color:windowtext;}.MsoChpDefault
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        font-size:12.0pt;
        font-family:"Calibri",sans-serif;}div.WordSection1
        {page:WordSection1;}</style>
      <div class="WordSection1">
        <p class="MsoNormal"><span style="font-size:14.0pt">Hi,<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">I am playing
            with flexible authentication. I have a blank midpoint 4.3.1
            setup on my local machine and put the the security policy
            (in the attached file) in the post-initial-objects
            directory. Then I can mimic the user by setting up the uid
            Request Header on my browser. It works but it generated the
            following exceptions on the server log. I do not see the
            error prevents the app from functioning but still it
            generates a lot of noise.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">My intension
            was to see how to front midpoint with a SP provider, hence
            the httpHeader module. This leads to my next question.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">What are the
            paths that I need to set to let shibboleth SP to require
            active session?
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">I don’t
            think all paths would work as it will block the emergency
            login. In addition, I guess it would prevent the server from
            using HTTP Basic that is required by a rest client.  <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">Xiaoshu Wang<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">2021-09-08
            08:59:23,340 [MODEL] [http-nio-8080-exec-3] ERROR
            (com.evolveum.midpoint.web.util.MidPointProfilingServletFilter):
            Encountered exception: java.lang.IllegalStateException:
            Cannot call sendRedirect() after the response has been
            committed<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">java.lang.IllegalStateException:
            Cannot call sendRedirect() after the response has been
            committed<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:488)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.firewall.FirewalledResponse.sendRedirect(FirewalledResponse.java:48)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.util.OnCommittedResponseWrapper.sendRedirect(OnCommittedResponseWrapper.java:136)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.util.OnCommittedResponseWrapper.sendRedirect(OnCommittedResponseWrapper.java:136)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.servlet.ServletWebResponse.sendRedirect(ServletWebResponse.java:288)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.BufferedWebResponse$SendRedirectAction.invoke(BufferedWebResponse.java:409)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.BufferedWebResponse.writeTo(BufferedWebResponse.java:602)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.HeaderBufferingWebResponse.stopBuffering(HeaderBufferingWebResponse.java:60)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.HeaderBufferingWebResponse.flush(HeaderBufferingWebResponse.java:97)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:277)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:206)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:299)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
com.evolveum.midpoint.web.util.MidPointProfilingServletFilter.doFilter(MidPointProfilingServletFilter.java:79)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:406)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:81)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
com.evolveum.midpoint.web.security.filter.MidpointAuthFilter$VirtualFilterChain.doFilter(MidpointAuthFilter.java:418)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:14.0pt">           
            at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
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    </blockquote>
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