Internal Error connecting GitHub to Jenkins - form field validation (HTTP 500)

Using Jenkins
1

I am a brand new Jenkins user. Really new, so please don’t assume I know the obvious.

I am attempting to connect my GitHub instance to Jenkins. I understand I need to use SSH. I have successfully generated a new key pair. Each time I try to authenticate, I get a message that says:
“An internal error occurred during form field validation (HTTP 500). Please reload the page and if the problem persists, ask the administrator for help.”

I have tried this 20 different times and I do not know what to change.I have included a youtube link to my video showing my steps. Please help! Thank you in advance.

2

HTTP response code 500 is an internal server error. The most frequent place where I’ve seen that is when a misconfigured reverse proxy sits between the user and Jenkins controller. You don’t mention a reverse proxy, but if one is involved, you should review the reverse proxy configuration instructions to assure that you’ve configured it correctly.

3

Hi @MarkEWaite . Thank you very much for responding. I don’t have any proxies or anything of that sort. I simply installed Jenkins on my local box. Again, I’m new and don’t know much of the sort. Let me know if there are other suggestions. Looks like we’ve had a few views on the topic. Thanks again!

4

Check the Jenkins log on the controller to see if there is more information provided in the log.

5

All Jenkins Logs
Log messages at a level more verbose than INFO (i.e., CONFIG, FINE, FINER, FINEST) are never recorded in the Jenkins log. Use log recorders to record these log messages.

Nov 27, 2023 11:48:48 AM INFO hudson.WebAppMain contextInitialized

Jenkins home directory: C:\ProgramData\Jenkins.jenkins found at: EnvVars.masterEnvVars.get(“JENKINS_HOME”)

Nov 27, 2023 11:48:48 AM INFO org.eclipse.jetty.server.handler.ContextHandler doStart

Started w.@68ed96ca{Jenkins v2.426.1,/,file:///C:/ProgramData/Jenkins/war/,AVAILABLE}{C:\ProgramData\Jenkins\war}

Nov 27, 2023 11:48:48 AM INFO org.eclipse.jetty.server.AbstractConnector doStart

Started ServerConnector@1a84f40f{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}

Nov 27, 2023 11:48:48 AM INFO org.eclipse.jetty.server.Server doStart

Started Server@4fe767f3{STARTING}[10.0.17,sto=0] @3642ms

Nov 27, 2023 11:48:48 AM INFO winstone.Logger logInternal

Winstone Servlet Engine running: controlPort=disabled

Nov 27, 2023 11:48:49 AM INFO jenkins.InitReactorRunner$1 onAttained

Started initialization

Nov 27, 2023 11:48:50 AM INFO jenkins.InitReactorRunner$1 onAttained

Listed all plugins

Nov 27, 2023 11:48:58 AM INFO jenkins.InitReactorRunner$1 onAttained

Prepared all plugins

Nov 27, 2023 11:48:58 AM INFO jenkins.InitReactorRunner$1 onAttained

Started all plugins

Nov 27, 2023 11:48:58 AM INFO jenkins.InitReactorRunner$1 onAttained

Augmented all extensions

Nov 27, 2023 11:48:59 AM INFO hudson.plugins.build_timeout.global.GlobalTimeOutConfiguration load

global timeout not set

Nov 27, 2023 11:49:00 AM INFO jenkins.InitReactorRunner$1 onAttained

System config loaded

Nov 27, 2023 11:49:00 AM INFO jenkins.InitReactorRunner$1 onAttained

System config adapted

Nov 27, 2023 11:49:00 AM INFO jenkins.InitReactorRunner$1 onAttained

Loaded all jobs

Nov 27, 2023 11:49:00 AM INFO jenkins.InitReactorRunner$1 onAttained

Configuration for all jobs updated

Nov 27, 2023 11:49:00 AM INFO jenkins.InitReactorRunner$1 onAttained

Completed initialization

Nov 27, 2023 11:49:00 AM INFO hudson.lifecycle.Lifecycle onReady

Jenkins is fully up and running

Nov 27, 2023 11:51:43 AM WARNING org.eclipse.jetty.server.handler.ContextHandler$Context log

Error while serving http://localhost:8080/job/MavenPractice%20E2EIntegration/descriptorByName/hudson.plugins.git.UserRemoteConfig/checkUrl
java.lang.RuntimeException: ssh executable not found. The git plugin only supports official git client Git - Downloading Package
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getSSHExecutable(CliGitAPIImpl.java:2690)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.createWindowsGitSSH(CliGitAPIImpl.java:2697)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2123)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2079)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2070)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getHeadRev(CliGitAPIImpl.java:3770)
at hudson.plugins.git.UserRemoteConfig$DescriptorImpl.doCheckUrl(UserRemoteConfig.java:212)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:733)
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:397)
Caused: java.lang.reflect.InvocationTargetException
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:401)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:409)
at org.kohsuke.stapler.interceptor.RequirePOST$Processor.invoke(RequirePOST.java:78)
at org.kohsuke.stapler.PreInvokeInterceptedFunction.invoke(PreInvokeInterceptedFunction.java:26)
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:770)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
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:770)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:289)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:698)
at org.kohsuke.stapler.Stapler.service(Stapler.java:248)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:163)
at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:76)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:166)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:154)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$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:126)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:110)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:101)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:227)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:221)
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:117)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
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:569)
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:1570)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)
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:1543)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)
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$RequestDispatchable.dispatch(HttpChannel.java:1598)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
at java.base/java.lang.Thread.run(Thread.java:1583)

6

The Jenkins controller process where that command is being run does not have ssh in the path. Command line git requires ssh in order to access repositories with the ssh protocol.