Mistral should not be able to rerun task with on-error branch

Bug #1843902 reported by Oleg Ovcharuk
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Oleg Ovcharuk

Bug Description

If the task has either "on-error" branch, we should not be able to rerun it.
Let's consider this example:

    "version": "2.0",
    "wf": {
        "tasks": {
            "t1": {
                "action": "some_unstable_action",
                "on-error": "t2",
                "on-success": "t3"
            "t2": {
                "action": "std.fail"
            "t3": {
                "action": "std.fail"

If t1 failed, wf will be failed by t2. In this situation we can rerun t1, and there will be 2 similar on-error branches. We can do it multiple times and there will be many equal branches from 1 task.
Let's imagine that one more rerun changed the situation and t1 was completed successfully. So there are multiple on-error branches and one on-success branch from one time on the same time!

This is not OK. Rerunning tasks with already handled errors should be restricted.

Changed in mistral:
milestone: none → ussuri-1
assignee: nobody → Oleg Ovcharuk (vgvoleg)
importance: Undecided → High
Oleg Ovcharuk (vgvoleg)
summary: - Mistral should not be able to rerun task with on-error/on-complete
- branches
+ Mistral should not be able to rerun task with on-error branch
description: updated
Changed in mistral:
milestone: ussuri-1 → ussuri-2
Changed in mistral:
milestone: ussuri-2 → ussuri-3
Changed in mistral:
milestone: ussuri-3 → ussuri-rc1
Changed in mistral:
milestone: ussuri-rc1 → victoria-1
Changed in mistral:
milestone: victoria-1 → wallaby-1
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