Pipeline WebHook intermittently has incorrect completed events (canceled/success)

Summary

A customer reported missing incorrect WebHook messages on Pipeline completed events (canceled/success)

This impacts the reliability of WebHook events. This issue is for investigation.

Since there appears to be data loss and no workaround, I'm marking this as severity1. Please feel free to correct.

Steps to reproduce

Not known

What is the current bug behavior?

WebHook events are sometimes missing for pipeline completion.

What is the expected correct behavior?

WebHooks should be triggered for every stage of the pipeline lifecycle.

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of: sudo gitlab-rake gitlab:check SANITIZE=true)

(For installations from source run and paste the output of: sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)

(we will only investigate if the tests are passing)

Possible fixes

Edited by Sean Gregory