UDP server in php. Error when using MySQL, how to fix?

Question

PHP

server udp code - https://gist.github.com/belcoder/594ef4e1a796e1372d20
lines 40-60 I determine which message has arrived and run the desired function.
the functions themselves - https://gist.github.com/belcoder/c9c278175cd5987ff6c7
an error occurs:
dl1.joxi.net/drive/0006/2309/395525/150919/6326931...

it does not always appear, that is, there is no pattern Have not found.

Answer 1

that is, no, I did not find patterns.

This usually happens when you connect to the database and send the first request only after some time, say a minute.
solution - Doctrine/Connection has a ping method that checks if the connection to the database is alive.

Answer 2

1. Since the exception does not always pop up, then look at the MySQL logs.
2. You are told what the matter is and even the error code is indicated: General error: 2006 MySQL server has gone away.
3. The most difficult thing remains - to overcome laziness.