Missing top supervisor?

[Gregory Witek]

Hi Ulf,

I guess my question my actually not be an issue with setup, but I have a problem that I can't solve and it's somehow related to this library. I thought maybe you'll have some clue on why it happens.

I'm using Elixir and its Exrm library for generate a new release for my app and upgrade it on the fly. One of the requirements to make it happen is that all applications have a top-level supervisor. This is to ensure that they can handle failures probably. The issue is better described here: bitwalker/exrm#183

When upgrading I get the message release_handler: cannot find top supervisor for application setup

Do you maybe know if this is an issue with setup and can be fixed? Or maybe it's more Exrm problem?

[Tino Breddin]

Hmm, weird that I didn't run into this issue although I already used the combination of Elixir, setup and exrm. I will double-check that again.

[Gregory Witek]

Hi @tolbrino,

thanks for your response! I confirm that once I added supervisor (I don't know Erlang at all, so I did it in a very primitive way) to setup.erl and started it instead of running proc_lib:start_link directly, the upgrades started working