System properties management

Question

Is there any \"adequate\" way to change system properties in Jenkins? What is the easiest/fastest way change them? For instance, I need to turn off the useless (in my case)

Answer 1

If you really want a quick and simple way to change a system property, you can use the script console

System.setProperty("hudson.remoting.Launcher.pingIntervalSec", 0)

But that won't survive a restart. To make it permanent, add the setting to the java args. For me (CentOS, Jenkins 2.7.1) that's a line about halfway down /etc/sysconfig/jenkins (for other distributions I believe it's /etc/default/jenkins) where you should add your option to the existing list like this:

JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true -Dhudson.remoting.Launcher.pingIntervalSec=0"

You'll have to restart Jenkins after you make that change (thanks Mark Tickner)

Answer 2

If you use Tomcat on Windows you can edit the File C:\apache-tomcat-7.0.67\conf\catalina.properties and simply add the Line

hudson.DNSMultiCast.disabled=true

at the End of the File. Then safe the File and restart Tomcat.

Answer 3

Maybe it's a bad hack but I set it in the pipeline job that needs the setting.
Like this:

System.setProperty("hudson.model.DirectoryBrowserSupport.CSP", "")  // allow formatted HTML pages to be published

It seems to work - as far as I can tell...

Answer 4

If you run Jenkins on windows as a service without tomcat, you can edit jenkins.xml. Add the property in <service><arguments> before the -jar. Than restart the service.

<service>
    <!-- ... -->
    <arguments>-Xrs -Xmx256m  -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle  -Dhudson.tasks.MailSender.SEND_TO_UNKNOWN_USERS=true  -Dhudson.tasks.MailSender.SEND_TO_USERS_WITHOUT_READ=true  -jar "%BASE%\jenkins.war" --httpPort=8080 --webroot="%BASE%\war"</arguments>

Answer 5

The system properties available and how to set them are listed on the wiki:
https://wiki.jenkins-ci.org/display/JENKINS/Features+controlled+by+system+properties

To disable slave pinging, you can set hudson.remoting.Launcher.pingIntervalSec to 0.

System properties can be set in the same way as with any other Java program, e.g.:
java -Dhudson.remoting.Launcher.pingIntervalSec=0 -jar jenkins.war

Answer 6

I followed each steps mentioned above but it fails.

So I did change the system time zone using timedatectl set-timezone Europe/London command and then I have restarted jenkins service service jenkins restart it worked.

1. I was using Rehdat 7.5
2. Jenkins version 2.168.
3. Jenkins Installed via yum install jenkins

I hope this will help some one.