pipeline {  
     agent any  
     stages {  
         stage('Test') {  
             steps {  
                 sh 'echo "Fail!"; exit 1'  
             }  
         }  
     }  
     post {  
         always {  
             echo 'This will always run'  
         }  
         success {  
             echo 'This will run only if successful'  
         }  
         failure {  
             mail bcc: '', body: "<b>Example</b><br>Project: ${env.JOB_NAME} <br>Build Number: ${env.BUILD_NUMBER} <br> URL de build: ${env.BUILD_URL}", cc: '', charset: 'UTF-8', from: '', mimeType: 'text/html', replyTo: '', subject: "ERROR CI: Project name -> ${env.JOB_NAME}", to: "foo@foomail.com";  
         }  
         unstable {  
             echo 'This will run only if the run was marked as unstable'  
         }  
         changed {  
             echo 'This will run only if the state of the Pipeline has changed'  
             echo 'For example, if the Pipeline was previously failing but is now successful'  
         }  
     }  
 }Code language: PHP (php)

post {
 always {
   sh 'echo "This will always run"'
 }
 success {
  sh 'echo "This will run only if successful"'
 }
 failure {
  sh 'echo "This will run only if failed"'
 }
 unstable {
  sh 'echo "This will run only if the run was marked as unstable"'
 }
 changed {
  sh 'echo "This will run only if the state of the Pipeline has changed"'
  sh 'echo "For example, the Pipeline was previously failing but is now successful"'
  sh 'echo "... or the other way around :)"'
 }
}Code language: JavaScript (javascript)

To ignore a failed step in declarative pipeline you basically have two options:

Use script step and try-catch block (similar to previous proposition by R_K but in declarative style)
stage('someStage') {
    steps {
        script {
            try {
                build job: 'system-check-flow'
            } catch (err) {
                echo err.getMessage()
            }
        }
        echo currentBuild.result
    }
}
Use catchError
stage('someStage') {
    steps {
        catchError {
            build job: 'system-check-flow'
        }
        echo currentBuild.result
    }
}
In both cases the build won't be aborted upon exception in build job: 'system-check-flow'. In both cases the echo step (and any other following) will be executed.Code language: JavaScript (javascript)

Rajesh Kumar

I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow , and SEO strategies at Wizbrand.

Do you want to learn Quantum Computing?

Please find my social handles as below;

Rajesh Kumar Personal Website
Rajesh Kumar at YOUTUBE
Rajesh Kumar at INSTAGRAM
Rajesh Kumar at X
Rajesh Kumar at FACEBOOK
Rajesh Kumar at LINKEDIN
Rajesh Kumar at WIZBRAND