Java 重复的日志条目 log4j
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Duplicate log entries log4j
提问by prabu
I am getting duplicate entries in my log file. Have attached my log4j.properties below.
我在我的日志文件中收到重复的条目。在下面附上了我的 log4j.properties。
log4j.properties:
log4j.properties：
###############################################################################
# log4j Configuration file: Defines following loggers
# SL - Standard root Logger
# EL - Error Logger with the threshold level explicitly set to ERROR
# DL - Data base logger - to log db queries separately
# BL - Batch logger
###############################################################################
log4j.rootLogger=TRACE,SL,EL
log4j.rootLogger.additivity=false
#Standard Log
log4j.appender.SL=org.apache.log4j.DailyRollingFileAppender
log4j.appender.SL.File=${log.file}/log.log
log4j.appender.SL.layout=org.apache.log4j.PatternLayout
log4j.appender.SL.layout.ConversionPattern=[%5p] [%t %d{HH:mm:ss:SSS}] [%X{sessionId}:%X{hostId}:%X{userId}] (%F:%M:%L) %m%n
#Error Log
log4j.appender.EL=org.apache.log4j.DailyRollingFileAppender
log4j.appender.EL.File=${log.file}/error.log
log4j.appender.EL.layout=org.apache.log4j.PatternLayout
log4j.appender.EL.Threshold=ERROR
log4j.appender.EL.layout.ConversionPattern=[%5p] [%t %d{HH:mm:ss:SSS}] [%X{sessionId}:%X{hostId}:%X{userId}] (%F:%M:%L) %m%n
# Database Log
log4j.logger.org.springframework.jdbc=DEBUG,DL
log4j.appender.DL=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DL.File=${log.file}/db.log
log4j.appender.DL.layout=org.apache.log4j.PatternLayout
log4j.appender.DL.layout.ConversionPattern=[%5p] [%t %d{HH:mm:ss:SSS}] [%X{sessionId}:%X{hostId}:%X{userId}] (%F:%M:%L) %m%n
#Forecast Log
log4j.appender.MAPS_FC=org.apache.log4j.DailyRollingFileAppender
log4j.appender.MAPS_FC.File=${log.file}/forecast.log
log4j.appender.MAPS_FC.layout=org.apache.log4j.PatternLayout
log4j.appender.MAPS_FC.layout.ConversionPattern=[%5p] [%t %d{HH:mm:ss:SSS}] [%X{sessionId}:%X{hostId}:%X{userId}] (%F:%M:%L) %m%n
#Logger configuration
log4j.logger.com.singaporeair.maps=TRACE,SL,EL
log4j.logger.com.singaporeair.maps.app.service.impl.gantt=DEBUG,MAPS_FC
log4j.logger.com.singaporeair.maps.app.dao.impl.gantt=DEBUG,MAPS_FC
Getting dulicate entries in log.logfile configured above.
在上面配置的log.log文件中获取重复条目。
Log extract:
日志提取：
[ INFO] [SimpleAsyncTaskExecutor-9 19:04:00:800] [::] (AppProfiler.java:doProfile:69) Processing Time(ms): BaseDAOImpl: getBatchDetails: 63
[ INFO] [SimpleAsyncTaskExecutor-9 19:04:00:800] [::] (AppProfiler.java:doProfile:69) Processing Time(ms): BaseDAOImpl: getBatchDetails: 63
[ INFO] [SimpleAsyncTaskExecutor-9 19:04:00:800] [::] (AppProfiler.java:doProfile:71) BaseDAOImpl: getBatchDetails: OUT
[ INFO] [SimpleAsyncTaskExecutor-9 19:04:00:800] [::] (AppProfiler.java:doProfile:71) BaseDAOImpl: getBatchDetails: OUT
Pls help
请帮忙
回答by DwB
com.singaporeair.mapsis a superset of com.singaporeair.maps.app.service.impl.ganttand com.singaporeair.maps.app.dao.impl.gantt
com.singaporeair.maps是的超集com.singaporeair.maps.app.service.impl.gantt和com.singaporeair.maps.app.dao.impl.gantt
Everything that matches com.singaporeair.maps.app.dao.impl.ganttwill also match com.singaporeair.mapswhich will result in 2 log entties.
匹配的所有内容也com.singaporeair.maps.app.dao.impl.gantt将匹配com.singaporeair.maps，这将产生 2 个日志实体。
Guess 1: You need to turn off appender inheritance. It appears that this is wrong.
猜测1：需要关闭appender继承。看来这是错误的。
Guess 2: The root logger and the com.singaporeair.maps are both logging to the SL and EL appenders. This is just a guess, but try changing this:
猜测 2：根记录器和 com.singaporeair.maps 都记录到 SL 和 EL 附加程序。这只是一个猜测，但尝试改变这一点：
log4j.logger.com.singaporeair.maps=TRACE,SL,EL
to this:
对此：
log4j.logger.com.singaporeair.maps=TRACE
回答by amcintosh
If you turn off additivity, the loggers that are children of the parents won't cause double logging. For instance:
如果您关闭可加性，作为父母的孩子的记录器不会导致双重记录。例如：
#Logger configuration
log4j.logger.com.singaporeair.maps=TRACE,SL,EL
log4j.additivity.com.singaporeair.maps=false
log4j.logger.com.singaporeair.maps.app.service.impl.gantt=DEBUG,MAPS_FC
log4j.additivity.com.singaporeair.maps.app.service.impl.gantt=false
log4j.logger.com.singaporeair.maps.app.dao.impl.gantt=DEBUG,MAPS_FC
log4j.additivity.com.singaporeair.maps.app.dao.impl.gantt=false
回答by DenisD
Probably would be helpful for those who experience duplicate problem in a multithread application (couldn't find the answer in google):
可能对那些在多线程应用程序中遇到重复问题的人有所帮助（在 google 中找不到答案）：
This happens when one thread is done and another thread open logger to the same log file which the first thread used to write.
当一个线程完成并且另一个线程将记录器打开到第一个线程用来写入的同一个日志文件时，就会发生这种情况。
.removeAllAppenders()before I added a new appender helped to resolve the issue.
.removeAllAppenders()在我添加一个新的 appender 之前帮助解决了这个问题。
