Background job is killed after Jenkins job finishes

Using Jenkins
1

Hi, I am trying to start a background process by running a shell script from the jenkins jobs. The problem is as soon as the job completes the background job is getting killed. I have tried running it with nohup as well as by giving parameter “BUILD_ID=dontKillMe” but it didn’t work.

It will be a big help if someone could guide me on this.

2

Jenkins kills all processes started by job once the job is finished to avoid that you have runaway processes.
Starting background jobs from Jenkins is not the right approach I think because when the job runs multiple times it will try to start the daemon multiple times. So you would need to find a way to reliable kill the background process once the Jenkins job runs again.

3

Technically it is possible to stop Jenkins from killing the daemon process
https://wiki.jenkins.io/display/JENKINS/ProcessTreeKiller
Just don’t pass it as a job parameter and for pipeline jobs you have to use JENKINS_NODE_COOKIE instead of BUILD_ID

4

Hi @mawinter69, I tried this but it didn’t worked. Can you help with any other alternatives.

5

Are you doing this in a pipeline job or a freestyle job?
Can you share the script that you run?
e.g. in a pipeline script you should do something like this:

sh '''
  JENKINS_NODE_COOKIE=dontKillMe /mybackgroundexecutable &
'''
6

I am running as freestyle job.

command :-
daemonize -E BUILD_ID=dontKillMe nohup $SPLEBASE/bin/threadpoolworker.sh -d Y -p DEFAULT=5 >/dev/null 2>&1 &

7

If that is the last command in the script you can try

export BUILD_ID=dontKillMe
daemonize nohup $SPLEBASE/bin/threadpoolworker.sh -d Y -p DEFAULT=5 >/dev/null 2>&1 &
8

It didn’t worked. Alternatively when I tried to run above command without nohup the jenkins job is running indefinitely. Its like I am stuck in an infinite loop.

9

Can anyone help me on this, I tried many options but didn’t none of it worked. It will be very helpful if someone could help me here.

10

You can use
JENKINS_NODE_COOKIE=dontKillMe nohup java -jar app.jar > nohup.out &
Reference: Jenkins : ProcessTreeKiller

11

How can I do the same thing on Windows machine?