# Reverse Proxy Test does not handle URL correctly **URL:** \ **Category:** Ask a question\ **Created:** [January 20, 2022, 4:12pm UTC](https://community.jenkins.io/t/reverse-proxy-test-does-not-handle-url-correctly/1294 "2022-01-20T16:12:34Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![william\_ghost](https://avatars.discourse-cdn.com/v4/letter/w/b38774/32.png) [@william\_ghost](https://community.jenkins.io/u/william_ghost)\ **Post date:** [December 23, 2022, 10:30am UTC](https://community.jenkins.io/t/reverse-proxy-test-does-not-handle-url-correctly/1294/9 "2022-12-23T10:30:30Z")
I have exactly the same problem. The error comes together with an uncaught exception. ```auto Dec 23, 2022 9:43:47 AM WARNING hudson.init.impl.InstallUncaughtExceptionHandler handleException Caught unhandled exception with ID 3e34942d-affe-4475-8bbf-aff559e6518c java.lang.NullPointerException: Cannot invoke "String.getBytes(java.nio.charset.Charset)" because "value" is null at jenkins.diagnostics.URICheckEncodingMonitor.doCheckURIEncoding(URICheckEncodingMonitor.java:46) at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:732) at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:397) at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:409) at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:207) at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140) at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:558) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59) at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:762) Caused: javax.servlet.ServletException at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:812) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:894) at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:289) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59) at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:762) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:894) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:690) at org.kohsuke.stapler.Stapler.service(Stapler.java:240) at javax.servlet.http.HttpServlet.service(HttpServlet.java:590) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764) at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:157) at jenkins.security.ResourceDomainFilter.doFilter(ResourceDomainFilter.java:81) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154) at jenkins.telemetry.impl.UserLanguages$AcceptLanguageFilter.doFilter(UserLanguages.java:129) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154) at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:160) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:160) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:94) at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:122) at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:116) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:109) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:106) at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:97) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:223) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:217) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:97) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:112) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:82) at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99) at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:111) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:172) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:53) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:549) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1571) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1383) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1544) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1305) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.Server.handle(Server.java:563) at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:505) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:762) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:497) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:558) at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:379) at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:146) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:139) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:933) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1077) at java.base/java.lang.Thread.run(Thread.java:833) Dec 23, 2022 9:43:48 AM WARNING hudson.diagnosis.ReverseProxySetupMonitor getTestForReverseProxySetup https://example.com/jenkins/manage vs. https: ``` So the problem is the last line, it does not “register” the server name internally for some reason, just truncates the address entered in the UI to **“https:”** --- _[View the full topic](https://community.jenkins.io/t/reverse-proxy-test-does-not-handle-url-correctly/1294)._