Ansible: Perform a failed_when: on an async task based on a value from stdout

Question

I am trying to perform a failed_when: on an async task based on a value from stdout.

This is my task:

  - name: RUN SOME TASK LOCALLY
           


        

Answer 1

You may help ansible to avoid templating crash because of undefined variable.
Change fail_when: like this:

failed_when: "poll_status.stdout is defined and 'ERROR' in poll_status.stdout"

If job is not finished by the first run of polling task, stdout is not yet populated and thus undefined, causing templating engine to crash.