When logging, logged messages are differentiated by their importance. In most logging frameworks we differentiate the following levels of importance:
DEBUG- Lowest level. Fine-grained statements concerning program state, typically used for debugging. Used primarily by the developers.INFO- Informational statements concerning program state, representing program events or behavior tracking. May be used when tracking user activity by the support staff.WARN- Statements that describe potentially harmful events or states in the program.ERROR- Statements that describe non-fatal errors in the application; this level is used quite often for logging handled exceptionsFATAL- Statements representing the most severe of error conditions, assumedly resulting in program termination.
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