jenkinspluginsamazon-ec2system-properties

Disable pinging slaves in Jenkins

So, we are seeing tons of our EC2 slaves go offline (using EC2 plugin). So to debug it I am trying to disabe pinging thread based on the article Pinging thread where they talk about disabling the ping thread on the master JVM on a running jenkins using:

Jenkins.instance.injector.getInstance(hudson.slaves.ChannelPinger.class).@pingInterval = -1

and to disable slaves from pinging the master, the system property -Dhudson.remoting.Launcher.pingIntervalSec=-1 needs to be set to slaves.

Questions:

  1. Where and how do I add the pingInterval value to -1?
  2. How and where do I set the system property for pingIntervalSec=-1

We are seeing tons of slaves going offline and I want to see if ping interval can help.

Thanks, Jason

Solution

  • At the master node, you can change the system property under /etc/sysconfig/jenkins

    JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true -Dhudson.remoting.Launcher.pingIntervalSec=-1"

    you can set the system property when you are running the slave (via JNPL):

    java -Dhudson.remoting.Launcher.pingIntervalSec=-1 -jar slave.jar -jnlpUrl <Jenkins root URL>

    -K