I have an application which has always worked fine locally, and works well in production but today I’ve been trying to start it iex -S mix phx.server and I get this error message:

GenServer {Oban.Registry, {Oban, {:plugin, Oban.Plugins.Cron}}} terminating
** (DBConnection.ConnectionError) connection not available and request was dropped from queue after 2964ms. This means requests are coming in and your connection pool cannot serve them fast enough. You can address this by:

  1. Ensuring your database is available and that you can connect to it
  2. Tracking down slow queries and making sure they are running fast enough
  3. Increasing the pool_size (although this increases resource consumption)
  4. Allowing requests to wait longer by increasing :queue_target and :queue_interval

See DBConnection.start_link/2 for more information
...

Application scrivener exited: :stopped
** (Mix) Could not start application myapp_data: MyApp.Application.start(:normal, []) returned an error: shutdown: failed to start child: Oban
    ** (EXIT) shutdown: failed to start child: "accounting"
        ** (EXIT) shutdown: failed to start child: Oban.Queue.Producer
            ** (EXIT) exited in: GenServer.call(#PID<0.1122.0>, {:listen, [:insert, :signal]}, 5000)
                ** (EXIT) time out

I’m on the main branch, no changes. I don’t have any other beam instances running and just to be sure I ran killall -9 beam.smp. I’ve removed _build no luck.

I’ve had similar issues in the past but never this persistent and generally one of the above solves the issue.