Heroku complaining the free dynos taking too much time

[ddfridley]

I looked at the list of free dynos and saw that undebate-qa and undebate-cc were both running (solid purple). I looked at the logs and saw that each has a socket connection. For example:

2020-05-25T03:18:22.134396+00:00 heroku[router]: at=info method=GET path="/socket.io/?EIO=3&transport=websocket&sid=-eZSN9QInKoY7ddHAAAH" host=undebate-qa.herokuapp.com request_id=6f15a3e5-97ef-4fd5-b2b9-7f9c6d1ec331 fwd="24.240.33.254" dyno=web.1 connect=0ms service=85262ms status=101 bytes=175 protocol=https

Could it be that if keeps a socket open, the free servers don't shut down, and heroku logs those hours.

Or could it be that something in helmet, that has recently been added, is preventing heroku from shutting these down?