Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure The last
时间: 2023-10-27 11:54:55 浏览: 76
This error message usually indicates a problem with the connection between your application and the MySQL database server. Here are a few things you can try to troubleshoot the issue:
1. Check your network connection: Make sure that your application server can communicate with the MySQL server. Ensure that there are no network issues, such as firewalls or network congestion.
2. Check MySQL server status: Verify that the MySQL server is up and running and that it's listening on the correct port. You can use the command "sudo systemctl status mysql" to check the status of the MySQL server.
3. Check MySQL logs: Check the MySQL error logs for any errors that may be causing the connection failure. The logs are usually located at /var/log/mysql/error.log.
4. Check MySQL configuration: Verify that the MySQL configuration is correct and that the connection parameters in your application code are correct. Check that the database name, username, and password are correct.
5. Increase the connection timeout: If the connection is timing out, increase the connection timeout in your application code or MySQL configuration file.
6. Restart MySQL server: Try restarting the MySQL server to clear any cached connections or other issues that may be causing the problem.
I hope this helps you resolve the issue. Let me know if you have any other questions.
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