how to append date to log file name using RollingFileAppender

Question

i'm using log4j RollingFileAppender , i'm trying to append date to file name

so i append "-%d{yyyy-MM-dd_HH-mm}." to active file name property in log4j.properties like below , however file is generated with name mylog-%d{yyyy-MM-dd_HH-mm}.log without setting the date

log4j.appender.mylog.rollingPolicy.ActiveFileName=mylog-%d{yyyy-MM-dd_HH-mm}.log

any helping ideas ??

Solution

If you want a new log file every day use DailyRollingFileAppender. When it creates a new log file it'll rename the old one and add a date. E.g. server.log will be renamed to server.log.2013-08-28

log4j.rootLogger=INFO,Stdout, DAILY

log4j.appender.DAILY=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DAILY.File=${catalina.home}/logs/server.log
log4j.appender.DAILY.DatePattern='.'yyyy-MM-dd
log4j.appender.DAILY.layout=org.apache.log4j.PatternLayout
log4j.appender.DAILY.layout.conversionPattern=%d %-5p - %-26.26c{1} - %m %n

Comments

[Zinab Taher]

i want a new log file based on size not every day , so i used RollingFileAppender

[Julien]

Be more precise in your question then because it seems no one understands what you want.

[papkass]

Then use MaxFileSize along with DatePattern