Over time losing connection to mysql server during queries - mysql

Question

I am running a discord bot using a MySQL server which are BOTH running on my UBUNTU 18.04 server. It works fine, but after a few hours I start to get an error any time I access the database.
Traceback (most recent call last):
File "/home/narnar/.local/lib/python3.7/site-packages/discord_slash/client.py", line 1352, in invoke_command
await func.invoke(ctx, **args)
File "/home/narnar/.local/lib/python3.7/site-packages/discord_slash/model.py", line 209, in invoke
return await self.func(self.cog, *args, **kwargs)
File "/home/narnar/cool-art/cogs/artlevels.py", line 120, in leaderboardCommand
cur.execute("SELECT * FROM artLevels")
File "/home/narnar/.local/lib/python3.7/site-packages/mysql/connector/cursor_cext.py", line 271, in execute
raw_as_string=self._raw_as_string)
File "/home/narnar/.local/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 522, in cmd_query
sqlstate=exc.sqlstate)
mysql.connector.errors.OperationalError: 2013 (HY000): Lost connection to MySQL server during query

Answer 1

I solved this issue by not having connections open for too long. My program connected to the MySQL server at the beginning of the program and used that same connection all the time. So instead of having one connection, I just opened a connection when I needed to access the database then closed it afterwards. Just make sure you don't have your connection open for too long
Don't do this:
con = mysql.connector.connect(
host=host,
user="ImNotThat",
passwd="Stupid",
database="toShowMyPasswords"
)
async def someListenerEvent():
doThing()
con.commit()
Do this:
async def someListenerEvent():
con = mysql.connector.connect(
host=host,
user="ImNotThat",
passwd="Stupid",
database="toShowMyPasswords"
)
doThing()
con.commit()
cur.close()
con.close()