How to resolve automatic closure of MySQL connection.

If MySQL automatically closes the connection, you can try the following solutions:

1. To check the connection timeout settings of MySQL, you can extend the idle time of connections by modifying the wait_timeout and interactive_timeout parameters in the MySQL configuration file. Set these parameters to larger values, for example, wait_timeout=28800 and interactive_timeout=28800, and then restart the MySQL service.
2. Check the network connection: Make sure the network connection is stable with no interruptions or disconnections. You can test the connection by pinging the server.
3. Check the connection pool settings: If you are using a connection pool to manage database connections, you can review the configuration of the pool to ensure that the minimum idle and maximum connection settings are reasonable. Increasing the number of available connections in the pool can reduce the likelihood of connections being closed.
4. Using persistent connections: changing the database connection method from short connections to persistent connections allows the connection to remain open after each query. This can be achieved by setting the autocommit parameter to True in the mysql.connector.connect() function, or by executing the statement SET autocommit = 1 after connecting.
5. Sending periodic queries: A simple query statement (such as SELECT 1) can be sent periodically to keep the database connection active and prevent it from being closed.
6. Check server load: If server load is too high, it could result in MySQL closing connections to free up resources. Evaluate server load by examining CPU, memory, and disk usage. If load is excessive, optimize queries or increase server resources.

If none of the above methods work, you can check the error log of MySQL to find out more about the specific reasons for the connection being closed, and try to troubleshoot based on the hints in the error log.