Merge request stuck on "checking if merge request can be merged..."
Summary
Recently we've seen increased cases where merge requests get stuck on checks, the following messages shows for sometimes hours checking if merge request can be merged...
Steps to reproduce
Visit a merge request to trains on either www-gitlab-com or gitlab projects
Example Project
What is the current bug behavior?
Spinner is stuck for minutes/hours before adding to merge train is available
What is the expected correct behavior?
Check should not get stuck