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- ### stdout appender
- log4j.appender.stdout=org.apache.log4j.ConsoleAppender
- log4j.appender.stdout.Target=System.out
- log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
- log4j.appender.stdout.layout.ConversionPattern=[%d][%p][%c] %m%n
- ### rolling file appender
- log4j.appender.R=org.apache.log4j.RollingFileAppender
- log4j.appender.R.File=./log/hello.log
- log4j.appender.R.MaxFileSize=100KB
- log4j.appender.R.MaxBackupIndex=20
- log4j.appender.R.layout=org.apache.log4j.PatternLayout
- log4j.appender.R.layout.ConversionPattern=[%d][%p][%c] %m%n
- ### suppress 3rd party debug logs
- log4j.logger.org.xnio.nio=INFO
- log4j.logger.com.zaxxer.hikari=INFO
- ### root logger sets the minimum logging level
- ### and aggregates the appenders
- log4j.rootLogger=DEBUG, stdout, R
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