Does ScriptRunner Cloud guarantee script execution order?

[Andrew Lipscomb]

Say on a Post Function list I have 3 different scripts that do different things based on different execution conditionals, and would ideally be kept separately due to their use elsewhere in the system (if someone commits to the master backups its more work to merge into one megascript)

Lets call these Scripts A, B and C (in that order in the Post Function operation list)

 - Are they guaranteed to execute in that order (A->B->C)?

 - Will B execute before A is finished? Can/should B rely on possible changes made by A or assume randomness?

 - If B was to Transition an issue (thereby triggering other automation on a different Post Function routine) will C be run? If C was to run, will it fail due to outdated Transition data passed to the script?

The joys of an async environment  

[Jon Mort _Adaptavist_ · Accepted solution]

Hi Andrew,

The short answer is no. You can't rely on any ordering for post functions and scripts will be executed in parallel. JIRA fires off the webhooks that cause the scripts to be executed in the order they appear in, but it does not wait for the webhook to complete before sending the next.

We have some ideas around guaranteed ordering of post functions, such as having a list of scripts that execute as one post function, but nothing concrete as yet.

Regards, Jon

[Andrew Lipscomb]

So;

Are they guaranteed to execute in that order (A->B->C)? => Yes, JIRA respects the Post Function ordering

Will B execute before A is finished? Can/should B rely on possible changes made by A or assume randomness? => No; guarantees aren't there. Assume unreliable states if multiple scripts are modifying the same fields

If B was to Transition an issue (thereby triggering other automation on a different Post Function routine) will C be run? If C was to run, will it fail due to outdated Transition data passed to the script? => Yes, C will be run as its part of the Post Function op routine. Again assume unreliable states

Correct? Its basically what I expected, but good to confirm. 

[Aristedes Maniatis]

Is this also true for script listeners? That is, they run in parallel?

[Jon Mort _Adaptavist_]

Andrew: Yes if I understand correctly your scenario you're correct.

Aristedes: Yes they are run in parallel