Hi, 

I discovered a strange behaviour today when I installed a native Odoo Addon on my Odoo installation. 

My Setup: 

I run 3 Odoo instances via Docker. Each of them on a different port. I have a load balancer that chooses one of these 3 containers. Works perfectly ... BUT when I install an addon I get strange errors. In the end the addons cannot be installed. 

When I turn off the load balancer and reduce the instances to only one, I can install the addon when I connect directly on the docker container. 

My question now is, what exactly happens when an addons get installed? I did not found any similar problem in google. 

Someone who faced the same issue? Or maybe who could explain that behaviour?