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Why did my free-tier (but credit-card confirmed) Heroku app idle and shut down unexpectedly while being used? I was watching it log my activity on an active connection to the app when it suddenly idled and shut down.

heroku[web.1]: Idling
heroku[web.1]: State changed from up to down
heroku[web.1]: Stopping all processes with SIGTERM
heroku[web.1]: Process exited with status 143
heroku[router]: at=info method=GET path="/socket.io/?...
heroku[web.1]: Unidling
heroku[web.1]: State changed from down to starting
heroku[web.1]: Starting process with command `npm start`
app[web.1]: 
app[web.1]: > start /app<some other stuff>
app[web.1]: > node index.js $PORT
app[web.1]: 
app[web.1]: Server running on port 45155.
2heroku[web.1]: State changed from starting to up
Denis Cornehl
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CocoDaWhiteBerry
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  • Does this answer your question? [Understanding Heroku server status 143](https://stackoverflow.com/questions/15767685/understanding-heroku-server-status-143) – hong4rc Jan 03 '20 at 10:09

1 Answers1

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As stated by Heroku

If an app has a free web dyno, and that dyno receives no web traffic in a 30-minute period, it will sleep.

If your account has free dyno hours left then it will become active as soon as web traffic is received.

Personal accounts are given a base of 550 free dyno hours each month. In addition to these base hours, accounts that verify with a credit card will receive an additional 450 hours added to the monthly free dyno quota. This means you can receive a total of 1000 free dyno hours per month if you verify your account with a credit card.

Make sure you haven't utilized your free 1000 Hours!! which is pretty evident is not the case since your app restarted!! The traffic might be the issue!

Ashutosh Kumar
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