main/config/logging.properties

Parameter	Required	Default	Options	Description
logger.level	Optional	INFO	EMERGENCY, ALERT, CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG	Root log level
logger.handlers	Optional	CONSOLE,FILE	—	Active handlers
handler.CONSOLE.level	Optional	WARN	EMERGENCY, ALERT, CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG	Console handler log level
handler.FILE.level	Optional	INFO	EMERGENCY, ALERT, CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG	File handler log level
handler.FILE.fileName	Optional	/logs/OrganizationServer.log	—	Log file path
handler.FILE.rotateSize	Optional	100000000	—	Max log file size in bytes before rotation
handler.FILE.maxBackupIndex	Optional	40	—	Number of rotated log files to keep
handler.FILE.suffix	Optional	.zip	—	Compressed archive suffix for rotated files
handler.FILE.rotateOnBoot	Optional	True	—	Rotate log file on application startup
formatter.PATTERN.pattern	Optional	%d{yyMMddHHmmss.SSS} [%t] %-5p %c{1} - %m%n	—	Log line format pattern

Required is mandatory. Optional is not required. Enabled is required only if the related feature is enabled.

Note

logger.level is a ceiling for both handlers — both it and handler.FILE.level (or handler.CONSOLE.level) must be increased to see DEBUG output. Example: with logger.level: WARN, raising handler.FILE.level to DEBUG still only yields WARN-level file output, since the root logger already filtered it out.