[JIRA] [workflow-plugin] (JENKINS-27039) Option for input step to cancel older executions

Sat, 21 Feb 2015 06:01:43 -0800

Jesse Glick commented on New Feature JENKINS-27039

Open question what the exact form the option could take. I can think of four possible behaviors, not all of which are necessarily valuable enough to bother implementing and exposing in the UI:

  • Current behavior: each input step is independent.
  • Kill any older execution when a new input step starts. Thus for a given flow and input id (~ message, by default) there may only be one open prompt at a time.
  • Kill any older executions (possibly several) when a newer input step is approved or rejected. Thus the user could choose to approve a build which is not currently the latest, retaining the option to approve subsequent builds which are already waiting for approval.
  • Optionally kill older executions upon approval/rejection, but allow the approving/rejecting user to skip that on a case-by-case basis.

The third behavior seems the most useful to me. The second behavior suffers from the problem that a user may spend some time manually vetting a build, only to see it be discarded moments before clicking approval, just because a newer one happened to come in. The fourth behavior seems like it is asking the approver to make a choice that should have been left to the flow designer.

Also “older” vs. “newer” is ambiguous here. The simplest interpretation is by start time, but this could mean that a prompt in an earlier build is considered “newer” than a prompt in a later build, which is probably undesirable from the perspective of a pipeline where later builds are expected to supersede earlier ones. A more useful interpretation is a comparison by build number; this would complicate implementation of the second behavior slightly, since upon entering the step you would not only need to check for other builds which need to be canceled, you would need to check if this build should be canceled.
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