I'm running a ruby sinatra app inside passenger within a docker container using one of the passenger-docker images(phusion/passenger-ruby26). This app is a simple web app that makes calls to a database(it does not constantly talk with the database, statements are only called when a certain button is clicked). I can start the app up fine and click around in my web app for a short amount of time but it always errors out at around 60 seconds of uptime saying:
Could not spawn process for application /home/app/my_app: A timeout occurred while starting a preloader process.
Error ID: 3b9633ef
Error details saved to: /tmp/passenger-error-aFglsc.html
Mind you this happens even when I don't click anything. Within the html file it states:
The Phusion Passenger application server tried to start the web application, but this took too much time, so Passenger put a stop to that.
It suggests that the server may be low on resources but I've given it unlimited resources(4 core 2.2GHz, 16GB ram, & 4GB swap), here are the load averages(memory used was 3%)
Here is the 'Problem Location', shows that it errored out at the 'Load Application' subprocess.
Things I've tried:
- Running passenger from Nginx(same error)
- Removing all stdout logging functions in my ruby app
- Increasing passenger_start_timeout
- Making sure folder/file privileges are set correctly
- Starting passenger with a custom nginx-config-template that maxes out timeouts and resources
- Gave my docker container unlimited resources
Tried a few other miscellaneous things that I can't recall but those didn't prove effective either.
Does anyone have any idea what might be going on? I'll provide more info if needed.
Versions used:
- Passenger 6.0.3
- Ruby 2.6.3
- Sinatra 2.0.5
- Docker 18.09.0
Running on MacOS 10.14.6