Add a friendlier "in flight" error page
Summary:
Ref T11589. When we hit a fatal setup issue (essentially always a connection failure) after we've already survived them on at least one request, we can be pretty sure a server went down and that the problem is not a setup/configuration issue.
In this case, show a friendlier error page instead of the fairly detailed technical one.
Test Plan:
- Broke MySQL config.
- Restarted Apache.
- Got the "admin/setup" error page:
- Fixed the MySQL config.
- Loaded any page, to put us "in flight".
- Broke MySQL config.
- Loaded any page.
- Got the friendly "in flight" error page:
If you want to design this better, easiest way to get to it is:
- Set mysql.port to 9999 in conf/local/local.json.
- Reload any page while already running (don't restart).
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11589
Differential Revision: https://secure.phabricator.com/D16503