How to troubleshoot sudden lack of logging in Spring Boot?

If the Spring Boot application suddenly stops logging, you can try the following troubleshooting steps:

1. Check the log level: make sure the log level is correctly set, for example, if the log level is set to DEBUG but there is no DEBUG level log output, the logs will not be printed. You can check the log level configuration in the application.properties or application.yml file.
2. Check the log configuration file: Verify that the logback.xml or log4j2.xml log configuration file exists and is properly configured.
3. Check the logging framework dependencies: Ensure that the application’s dependencies include the appropriate logging framework, such as logback or log4j2. You can use build tools like Maven or Gradle to check and update dependencies.
4. Check the application code: Verify that the application code correctly logs information. Make sure to use Logger objects for logging and utilize the appropriate methods (e.g., logger.info(), logger.error()).
5. Check the log file path and permissions: Ensure that the log file’s path and permissions are configured correctly. If the log file cannot be written to or accessed, the logs will not be printed.
6. Restart the application: Try restarting the application, as sometimes log printing issues can be temporary and a restart can resolve the problem.

If the above methods do not solve the problem, you can try looking at the running logs of the application for more detailed information and check if there are any issues with the application’s other configurations.