Unable to access Jenkins server

Question

I'm trying to install Jenkins on my web server, which is an Ubuntu 13.10 server running on an Amazon EC2 instance. I've restarted Jenkins using

sudo /etc/init.d/jenkins restart

When I check my processes with

ps aux | grep jenkins

I can see multiple items running with the following descriptions:

jenkins  22356  0.0  0.0  20268   400 ?        S    10:10   0:00 /usr/bin/daemon --name=jenkins --inherit --env=JENKINS_HOME=/var/lib/jenkins --output=/var/log/jenkins/jenkins.log --pidfile=/var/run/jenkins/jenkins.pid -- /usr/bin/java -jar /usr/share/jenkins/jenkins.war --webroot=/var/run/jenkins/war --httpPort=8080 --ajp13Port=-1 --httpListenAddress=127.0.0.1 --ajp13ListenAddress=127.0.0.1 --preferredClassLoader=java.net.URLClassLoader
jenkins  22358  5.9  5.7 1618372 97376 ?       Sl   10:10   0:17 /usr/bin/java -jar /usr/share/jenkins/jenkins.war --webroot=/var/run/jenkins/war --httpPort=8080 --ajp13Port=-1 --httpListenAddress=127.0.0.1 --ajp13ListenAddress=127.0.0.1 --preferredClassLoader=java.net.URLClassLoader

The server doesn't want to allow me to access this installation, so if I visit

x.x.x.x:8080

I just get a "Oops! Google Chrome could not connect" page, not even a HTTP status 404 / 500.

I tried checking /var/log/jenkins/jenkins.log, but it doesn't indicate any problems. Here's the log output after restarting:

Running from: /usr/share/jenkins/jenkins.war
Dec 02, 2013 10:10:07 AM winstone.Logger logInternal
INFO: Beginning extraction from war file
Jenkins home directory: /var/lib/jenkins found at: EnvVars.masterEnvVars.get("JENKINS_HOME")
Dec 02, 2013 10:10:13 AM winstone.Logger logInternal
INFO: HTTP Listener started: port=8080
Dec 02, 2013 10:10:13 AM winstone.Logger logInternal
INFO: Winstone Servlet Engine v0.9.10 running: controlPort=disabled
Dec 02, 2013 10:10:14 AM jenkins.InitReactorRunner$1 onAttained
INFO: Started initialization
Dec 02, 2013 10:10:14 AM jenkins.InitReactorRunner$1 onAttained
INFO: Listed all plugins
Dec 02, 2013 10:10:14 AM jenkins.InitReactorRunner$1 onAttained
INFO: Prepared all plugins
Dec 02, 2013 10:10:14 AM jenkins.InitReactorRunner$1 onAttained
INFO: Started all plugins
Dec 02, 2013 10:10:14 AM jenkins.InitReactorRunner$1 onAttained
INFO: Augmented all extensions
Dec 02, 2013 10:10:22 AM jenkins.InitReactorRunner$1 onAttained
INFO: Loaded all jobs
Dec 02, 2013 10:10:23 AM jenkins.InitReactorRunner$1 onAttained
INFO: Completed initialization
Dec 02, 2013 10:10:23 AM hudson.TcpSlaveAgentListener <init>
INFO: JNLP slave agent listener started on TCP port 43315
Dec 02, 2013 10:10:23 AM hudson.WebAppMain$2 run
INFO: Jenkins is fully up and running

I was thinking I could be having a problem with EC2 security groups blocking the port, but my security group assigned to that server has got 8080 port opened for HTTP inbound.

Another check I tried was to SSH into the server, and use Lynx to see if Jenkins is actually serving content. I visited http://localhost:8080 and it was showing the Jenkins page as expected.

Any ideas?

Solution

EDIT 2

If running Jenkins on an Amazon EC2 instance, try setting HTTP_HOST to 0.0.0.0. You may not be able to bind the public interface IP directly.

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EDIT 1

Check /etc/default/jenkins instead if you installed directly from the .deb package.

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It appears Jenkins is listening on localhost (--httpListenAddress=127.0.0.1). In this configuration, Jenkins is not listening for connections from the network interface.

To resolve for Ubuntu, check the contents of /etc/init/jenkins.conf and append --httpListenAddress=x.x.x.x to JENKINS_ARGS (where x.x.x.x is the server's external IP address).

Comments

[Josef van Niekerk]

Cool, I changed HTTP_HOST to the correct IP address, but it causes SEVERE: Container startup failed, Failed to listen on port 8080 and Cannot assign requested address errors when restarting. :(

[Josef van Niekerk]

Should I try installing OpenJDK instead: stackoverflow.com/questions/14710095/…

[plasmid87]

Could be EC2 networking weirdness. Try setting HTTP_HOST to 0.0.0.0, does that help?

[Josef van Niekerk]

I tried 0.0.0.0 as well, but I'll give it another shot.