Jenkins parameterized job that only queues one build

Question

Imagine a Jenkins job A which takes 1 minute to run, and job B which takes 5 minutes.

If we configure job A to trigger job B, while job B is running job A may run 5

Answer 1

Here's one workaround:

• Create a job A2B between jobs A and B
• Add a build step in job A2B that determines whether B is running. To achieve that, check:
  • Determine if given job is currently running using Hudson/Jenkins API
  • Python API's is_queued_or_running()
• Finally, trigger job B from A2B only if there are no B builds queued or running (carrying the parameters through)