What does the WARN logging level indicate?

The WARN logging level is used to indicate a non-critical potential problem that could arise during the execution of an application. This level of logging serves as a warning to developers or system administrators that while the application is functioning, there may be issues that need to be monitored or addressed in the future. It allows teams to catch problems early without interrupting the overall operation of the system.

In contrast, the other options refer to levels of logging that serve different purposes. For example, signaling the end of a successful operation relates more to informational logging rather than warnings about potential issues. Critical user experience issues would likely be logged at an ERROR level, indicating a more severe problem that needs immediate attention. Regular processing information typically falls under the INFO level, which logs routine information about application operations that do not indicate any issues. Therefore, the correct understanding of the WARN level as a sign of a non-critical potential problem aligns with its purpose in the logging hierarchy.