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  1. Jenkins
  2. JENKINS-53734

Declarative pipeline - Support for parallel stages inside sequential stages

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      Description

      Yesterday, I tried using sequential stages. I have a pipeline consisting of 2 distinct parts, let's say JAVA PART and DOCKER PART, each with a different agent and several stages. Thus, I grouped them into two stages, assigned an agent and well, it worked as expected. Things went south when I wanted to use parallel stages inside JAVA PART:

      pipeline {
          agent none
          
          stages {
              stage("JAVA PART") {
                  agent A
      
                  stages {
                      stage("Java one") {
                          steps {
                              echo "Java one"
                          }
                      }
                      
                      stage("Java two") {
                          parallel {
                              stage("Java parallel one") {
                                  steps {
                                      echo "Java parallel one"
                                  }
                              }
                              
                              stage("Java parallel two") {
                                  steps {
                                      echo "Java parallel two"
                                  }
                              }
                          }
                      }
                      
                      stage("Java three") {
                          steps {
                              echo "Java three"
                          }
                      }
                  }
              }
              
              stage("DOCKER PART") {
                  agent B
                  
                  steps {
                      echo "Docker one"
                  }
              }
          }
      }
      

      I ended up with 

      Parallel stages or branches can only be included in a top-level stage.
      

      I wonder what the rationale behind this restriction is, because when I switch from parallel to stages and make it serial, everything is fine.

      pipeline {
          agent none
          
          stages {
              stage("JAVA PART") {
                  agent A
      
                  stages {
                      stage("Java one") {
                          steps {
                              echo "Java one"
                          }
                      }
                      
                      stage("Java two") {
                          stages {
                              stage("Java parallel one") {
                                  steps {
                                      echo "Java parallel one"
                                  }
                              }
                              
                              stage("Java parallel two") {
                                  steps {
                                      echo "Java parallel two"
                                  }
                              }
                          }
                      }
                      
                      stage("Java three") {
                          steps {
                              echo "Java three"
                          }
                      }
                  }
              }
              
              stage("DOCKER PART") {
                  agent B
                  
                  steps {
                      echo "Docker one"
                  }
              }
          }
      }
      

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              • Assignee:
                abayer Andrew Bayer
                Reporter:
                tomis Martin Tee
              • Votes:
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                • Created:
                  Updated:
                  Resolved: