When should the Warn logging level be used?

The use of the Warn logging level is primarily intended for indicating potential issues that may not currently impact the user experience but could lead to problems if not addressed. This level allows developers and system administrators to be informed about situations that warrant attention without suggesting immediate or critical failures. For example, it may be appropriate to log a warning when certain resource thresholds are nearing their limits or when a deprecated practice is used, so that remediation efforts can be planned before any significant issues arise.

Utilizing Warn logging for expected exceptions or serious application errors is not appropriate, as these situations require different logging levels (such as Info or Error) to convey their severity properly. Detailing internal method operations typically falls under the Debug logging level, which is oriented towards in-depth performance and operational insights rather than warning of potential problems. The Warn logging level serves as a proactive measure, allowing systems to maintain stability and performance by alerting developers to conditions that might escalate if not addressed.