pdawczak / ex_grok Goto Github PK

GenServer documentation mentions that once gen_server managing port is taken down, it automatically closes the port.

This turns to be true, however, it looks like ngrok itself needs a bit of time to shutdown nicely (probably it performs self cleanup when trying to close connection).

This in turn appears to be a problem for starting new gen_server in its place as it can't start properly due to still ongoing ngrok connection (this is very flakey, in some rare cases ngrok is able to disappear before exceeding restarting attempts and the whole app doesn't crash).

The only solution to problem appears to try to kill -9 ngrok process on gen_server crash to avoid this problem.