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Last active August 9, 2025 21:39
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How-to-Install-Jenkins-on-Rocky-Linux-9.md

Gist for https://youtu.be/2-L0WohfsqY

Install Temurin JDK

From CentOS/RHEL/Fedora Instructions:

  • Create RPM repository
cat <<EOF > /etc/yum.repos.d/adoptium.repo
[Adoptium]
name=Adoptium
baseurl=https://packages.adoptium.net/artifactory/rpm/${DISTRIBUTION_NAME:-$(. /etc/os-release; echo $ID)}/\$releasever/\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.adoptium.net/artifactory/api/gpg/key/public
EOF

  • Install Temurin 11 (this will fail)

    • dnf -y install temurin-11-jdk

  • Modify /etc/yum.repos.d/adoptium.repo

    • change rocky/$releasever to rocky/8

  • Install Temurin 11 (this will succeed)

    • dnf -y install temurin-11-jdk

Install Jenkins

From Jenkins Redhat Packages:

  • Create RPM repository

    • wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

  • Add repository key

    • rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

  • Install Jenkins

    • dnf -y install jenkins

Configure Jenkins

  • systemctl --full status jenkins
  • systemctl edit jenkins
[Service]
Environment="JAVA_OPTS=-Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Djava.io.tmpdir=/var/cache/jenkins/tmp/ -Dorg.apache.commons.jelly.tags.fmt.timeZone=America/New_York -Duser.timezone=America/New_York"
Environment="JENKINS_OPTS=--pluginroot=/var/cache/jenkins/plugins"
  • mkdir -p /var/cache/jenkins/tmp
  • chown -R jenkins:jenkins /var/cache/jenkins/tmp
  • systemctl show jenkins
  • systemd-analyze verify jenkins.service
  • systemctl start jenkins
  • systemctl --full status jenkins
  • journalctl -u jenkins
@medaby
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medaby commented Aug 9, 2025

I have this problem: I'm using OS Rocky 9 and Jenkins is running behind Nginx. I don't understand why it's not working.Please help me.

java.net.ConnectException: HTTP connect timed out
at java.net.http/jdk.internal.net.http.MultiExchange.toTimeoutException(MultiExchange.java:613)
Caused: java.net.http.HttpConnectTimeoutException: HTTP connect timed out
at java.net.http/jdk.internal.net.http.MultiExchange.toTimeoutException(MultiExchange.java:612)
at java.net.http/jdk.internal.net.http.MultiExchange.getExceptionalCF(MultiExchange.java:556)
at java.net.http/jdk.internal.net.http.MultiExchange.lambda$responseAsyncImpl$7(MultiExchange.java:475)
at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934)
at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:911)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2194)
at java.net.http/jdk.internal.net.http.Exchange.checkCancelled(Exchange.java:335)
at java.net.http/jdk.internal.net.http.Exchange.cancel(Exchange.java:298)
at java.net.http/jdk.internal.net.http.MultiExchange.cancel(MultiExchange.java:266)
at java.net.http/jdk.internal.net.http.PlainHttpConnection$ConnectTimerEvent.handle(PlainHttpConnection.java:103)
at java.net.http/jdk.internal.net.http.HttpClientImpl.purgeTimeoutsAndReturnNextDeadline(HttpClientImpl.java:1788)
at java.net.http/jdk.internal.net.http.HttpClientImpl$SelectorManager.run(HttpClientImpl.java:1386)
Caused: java.net.http.HttpConnectTimeoutException: HTTP connect timed out
at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:949)
at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:133)
at hudson.PluginManager.checkUpdateSiteURL(PluginManager.java:2090)
at hudson.PluginManager.doCheckUpdateSiteUrl(PluginManager.java:2041)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:733)
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:484)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:497)
at org.kohsuke.stapler.interceptor.RequirePOST$Processor.invoke(RequirePOST.java:79)
at org.kohsuke.stapler.PreInvokeInterceptedFunction.invoke(PreInvokeInterceptedFunction.java:26)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:218)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140)
at org.kohsuke.stapler.MetaClass$12.doDispatch(MetaClass.java:686)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:183)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:871)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
at org.kohsuke.stapler.MetaClass$10.dispatch(MetaClass.java:590)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:721)
at org.kohsuke.stapler.Stapler.service(Stapler.java:253)
at Jenkins Main ClassLoader//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHolder.handle(ServletHolder.java:765)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1668)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:204)
at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:77)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:207)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:154)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:94)
at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:125)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:114)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:105)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:229)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:106)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.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.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.ChainedServletFilter2.doFilter(ChainedServletFilter2.java:111)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:173)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.UncaughtExceptionFilter.doFilter(UncaughtExceptionFilter.java:26)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:31)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doHandle(ServletHandler.java:526)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:127)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.security.SecurityHandler.handle(SecurityHandler.java:574)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HandlerWrapper.handle(HandlerWrapper.java:124)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:197)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doHandle(SessionHandler.java:612)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:195)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doHandle(ContextHandler.java:1045)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:164)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doScope(ServletHandler.java:483)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doScope(SessionHandler.java:589)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doScope(ContextHandler.java:966)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:125)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.handle(ContextHandler.java:1719)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1565)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.dispatch(HttpChannel.java:724)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.handle(HttpChannel.java:512)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler$CoreContextHandler$CoreToNestedHandler.handle(ContextHandler.java:3029)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1071)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:611)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.Server.handle(Server.java:182)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:678)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:416)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:981)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1211)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1166)
at java.base/java.lang.Thread.run(Thread.java:1583)

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