MySQL connection dies after some time

[tomsik68]

I've noticed that if mamato is left running for a while, it is unable to connect to MySQL database to retrieve results. I believe it is caused by MySQL server connection timeout (or something like that).

Here is a full stack trace: https://pastebin.com/q4aDwket

The solution would be to re-establish the connection when it times out, as explained on these pages:

• https://discorporate.us/jek/talks/SQLAlchemy-EuroPython2010.pdf, page 32
• https://stackoverflow.com/a/47852079
• https://stackoverflow.com/a/18057194