[FIXED] Jenkins pipeline milestone not cancelling previous ongoing build

Issue

I am experimenting with Jenkins pipeline and milestones and cannot figure out why Jenkins is not cancelling the previous build when a new build crosses the milestone.

Example Jenkinsfile

pipeline {
    agent any

    parameters {
        booleanParam(defaultValue: true, description: '', name: 'userFlag')
    }

    stages {
        stage("foo") {
            steps {
                milestone(ordinal: 1, label: "BUILD_START_MILESTONE")
                sh 'sleep 1000'
            }
        }
    } 
}

Triggering this pipeline twice does not cancel the 1st job

Solution

I don't think the behavior is "If I'm a newer build that crosses this milestone, then all older build that crossed this milestone will be cancelled"

The actual behavior of the milestone step is that when a more recent pipeline crosses it first, then it prevents older pipeline from crossing that milestone.

Answered By - warhod
Answer Checked By - Marie Seifert (JavaFixing Admin)