supervisorctl died after upgrade

[ctheune]

This happened and didn't get unstuck on its own:

     ManagedMySQL > Grant(GRANT ALL)
     Supervisor > Buildout > File(work/supervisor/buildout.cfg) > Content(work/supervisor/buildout.cfg)
     Supervisor > Buildout > VirtualEnv(3) > VirtualEnvPy
     Supervisor > Buildout > VirtualEnv(3) > Package(setuptools==46.1.3)
     Supervisor > Buildout > VirtualEnv(3) > Package(zc.buildout==2.13.3)
     Supervisor > Buildout
     Supervisor > RunningSupervisor(<Service (default) "Supervisor > Service(bin/supervisord)">)
default: Deploying component instanceadmin ...
     InstanceAdmin > Instance > Buildout
     InstanceAdmin > Instance > Program(admin-instance)
ERROR: /home/vagrant/deployment/work/supervisor/bin/supervisorctl reread
     Return code: 1
STDOUT
     error: <class 'xmlrpc.client.ProtocolError'>, <ProtocolError for 127.0.0.1/RPC2: 500 Internal Server Error>: file: /home/vagrant/deployment/work/supervisor/eggs/supervisor-4.1.0-py3.7.egg/supervisor/xmlrpc.py line: 545

STDERR

I had to kill and restart supervisor. I guess the upgrade didn't really properly shutdown/restart supervisor here ... not sure how that was intended. Normally we want upgrades to be as quiet as possible and I guess a full restart isn't always needed anyway ...

[ctheune]

I can't reproduce this. I've found the same instance and down- and upgraded it but can't repeat it. Maybe this was something that was broken in between ... hmm. Not quite satisfied, but nowhere to go either.