MySql.Data.MySqlClient.MySqlException: Timeout expired

[K B]

I have a win service that uses a mysql database. the service periodically reads data from the mysql database. We also make automatic backups of the database every night. It appears that if the service wants to read data from the database during the automatic backup, there is this error:
"MySql.Data.MySqlClient.MySqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding '.
I tried to fix this by increasing 'default command timeout' => 'default command timeout = 5000', but that doesn't help.

Is there any to solve this in mysql?

Thanks in advance,
KB