Last time this worked without failure was in February.

After recent updates to Jenkins: Set a webhook (we use gitlab), set a branch filter for any branch (master or main, either does the same behavior). Note an error from jenkins (error 500 message or the jenkins oops error page). Check logs, see this:

 
Mar 22, 2024 1:52:51 PM WARNING hudson.init.impl.InstallUncaughtExceptionHandler handleException
Caught unhandled exception with ID 368de013-e963-4e32-8009-0af28b29f89a java.net.ConnectException: Connection refused at java.base/sun.nio.ch.Net.pollConnect(Native Method) at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672) at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:554) at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:602) at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) at java.base/java.net.Socket.connect(Socket.java:633) at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75) at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142) Caused: org.apache.http.conn.HttpHostConnectException: Connect to bosssyn3:30000 [bosssyn3/192.168.5.121] failed: Connection refused at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:156) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376) at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:336) Caused: javax.ws.rs.ProcessingException: RESTEASY004655: Unable to invoke request at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:341) at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:464) at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invokeSync(ClientInvoker.java:152) at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:115) at org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:76) at com.dabsquared.gitlabjenkins.gitlab.api.impl.$Proxy219.getCurrentUser(Unknown Source) at com.dabsquared.gitlabjenkins.gitlab.api.impl.ResteasyGitLabClient.getCurrentUser(ResteasyGitLabClient.java:178) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.autodetect(AutodetectingGitLabClient.java:386) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.autodetectOrDie(AutodetectingGitLabClient.java:373) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.delegate(AutodetectingGitLabClient.java:366) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient$GitLabOperation.execute(AutodetectingGitLabClient.java:403) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.execute(AutodetectingGitLabClient.java:397) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.getCurrentUser(AutodetectingGitLabClient.java:315) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.autodetect(AutodetectingGitLabClient.java:386) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.autodetectOrDie(AutodetectingGitLabClient.java:373) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.delegate(AutodetectingGitLabClient.java:366) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient$GitLabOperation.execute(AutodetectingGitLabClient.java:403) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.execute(AutodetectingGitLabClient.java:397) at com.dabsquared.gitlabjenkins.gitlab.api.impl.AutodetectingGitLabClient.getBranches(AutodetectingGitLabClient.java:295) at com.dabsquared.gitlabjenkins.service.GitLabProjectBranchesService$BranchNamesLoader.apply(GitLabProjectBranchesService.java:65) at com.dabsquared.gitlabjenkins.service.GitLabProjectBranchesService$BranchNamesLoader.apply(GitLabProjectBranchesService.java:49) at com.github.benmanes.caffeine.cache.BoundedLocalCache.lambda$doComputeIfAbsent$14(BoundedLocalCache.java:2688) at java.base/java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1916) at com.github.benmanes.caffeine.cache.BoundedLocalCache.doComputeIfAbsent(BoundedLocalCache.java:2686) at com.github.benmanes.caffeine.cache.BoundedLocalCache.computeIfAbsent(BoundedLocalCache.java:2669) at com.github.benmanes.caffeine.cache.LocalCache.computeIfAbsent(LocalCache.java:112) at com.github.benmanes.caffeine.cache.LocalManualCache.get(LocalManualCache.java:62) at com.dabsquared.gitlabjenkins.service.GitLabProjectBranchesService.getBranches(GitLabProjectBranchesService.java:39) at com.dabsquared.gitlabjenkins.trigger.branch.ProjectBranchesProvider.getProjectBranches(ProjectBranchesProvider.java:47) at com.dabsquared.gitlabjenkins.trigger.branch.ProjectBranchesProvider.doCheckBranchesSpec(ProjectBranchesProvider.java:79) at com.dabsquared.gitlabjenkins.GitLabPushTrigger$DescriptorImpl.doCheckIncludeBranchesSpec(GitLabPushTrigger.java:712) 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:770) Caused: javax.servlet.ServletException at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:818) 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 net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:239) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:215) at net.bull.javamelody.PluginMonitoringFilter.doFilter(PluginMonitoringFilter.java:88) at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:121) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160) 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:1580) 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:1553) 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:840)