How to setup BuildBlockerProperty on Jenkins MultiBranch pipeline

Question

I'm trying to prevent the run of branch_A while branch_B is running. So I succeeded with normal pipeline with BuildBlockerProperty , job_A stay in pending while job_B job is running. But with multibranch pipeline, it's not working.

Example for BuildBlockerProperty property for branch_A :

properties([
  [
    $class         : 'BuildBlockerProperty',
    blockLevel     : 'GLOBAL',
    blockingJobs   : 'branch_B',
    scanQueueFor   : 'ALL',
    useBuildBlocker: true
  ],
])

I saw on jenkins multibranch doc that is it possible but I don't find a way to do that. So if someone have the solution pls !

Answer 1

I found the solution. When you write the branch name, you should write also the multibranch job name. Exemple :

properties([
  [
    $class         : 'BuildBlockerProperty',
    blockLevel     : 'GLOBAL',
    blockingJobs   : 'multibranch_job_name/branch_B',
    scanQueueFor   : 'ALL',
    useBuildBlocker: true
  ],
])

But I didn't find a way if you want to run the job only if no other jobs are running. If someone have an idea.