What to do if mysql database automatically disconnects

MySQL database connection automatically disconnects is usually caused by connection timeout, server shutdown, network problems, database configuration and client errors. Workarounds include adjusting connection timeout settings, checking network connectivity, restarting the MySQL server, checking client applications, disabling automatic disconnection, reconnecting in client code, using connection pooling, and analyzing MySQL logs.

Solution to MySQL database automatically disconnecting

Question:Why MySQL database Will the connection be automatically disconnected?

Answer: MySQL database connection disconnection is usually caused by the following reasons:

• Connection timeout: The connection is inactive After a certain period of time (default is 8 hours), the MySQL server will automatically disconnect.
• Server shutdown: If the MySQL server is shut down or restarted, all connections will be disconnected.
• Network problems: The network connection is unstable or disconnected, which will also cause the connection to be disconnected.
• Database configuration: Some MySQL configurations, such as wait_timeout, control the timeout of the connection. If this time is too short, the connection will be disconnected.
• Client error: Improper handling of errors or exceptions by the client application may also cause the connection to be disconnected.

Solution:

1. Adjust the connection timeout setting:

In the MySQL configuration file (usually for /etc/my.cnf), increase the wait_timeout setting to extend the connection timeout.

2. Check the network connection:

Make sure the network connection between the client and the server is stable and reliable.

3. Restart the MySQL server:

If you suspect a server problem, please try restarting the MySQL server.

4. Check the client application:

Ensure that the client application handles connections and disconnections correctly and catches and handles all exceptions.

5. Disable automatic disconnection:

In the MySQL configuration file, set interactive_timeout to 0 to disable automatic disconnection.

6. Reconnect in client code:

Implement reconnect logic in client code to automatically reconnect when the connection is disconnected.

7. Use connection pooling:

Connection pooling can reduce the overhead of connection creation and disconnection, and improve the availability of connections.

8. Analyze MySQL logs:

Check the MySQL error log for any potential reasons for the disconnection.

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