Log4J Levels: ALL > TRACE > DEBUG > INFO > WARN > ERROR > FATAL > OFF

Loggers may be assigned levels. The set of possible levels, that is DEBUG, INFO, WARN, ERROR and FATAL are defined in the org.apache.log4j.Level class. If a given logger is not assigned a level, then it inherits one from its closest ancestor with an assigned level. The root logger resides at the top of the logger [...]

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