问题
I'm using Apache Flink v1.2. I wanted to switch to a rolling file appender to avoid huge log files containing data for several days. However it doesn't seem to work. I adapted the log4j Configuration (log4j.properties
) as follows:
log4j.appender.file=org.apache.log4j.rolling.RollingFileAppender
log4j.appender.file.RollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy
log4j.appender.file.DatePattern='.' yyyy-MM-dd-a'.log'
log4j.appender.file.MaxBackupIndex = 15
log4j.appender.file.append=false
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
First it complains it cannot find org.apache.log4j.rolling.RollingFileAppender
. So I switch it to org.apache.log4j.RollingFileAppender
and then it says RollingPolicy
and DatePattern
are not valid attributes for the RollingFileAppender
.
Did anyone else encounter same issues / can you suggest what's wrong with this configuration?
回答1:
In order to use the RollingFileAppender
you first have to add the apache-log4j-extras-1.2.17.jar
to your classpath (e.g. adding it to Flink's lib
folder).
Next you have to configure it and specify a FileNamePattern
before specifying the RollingPolicy
. With the following log4j.properties
file I can use the RollingFileAppender
.
log4j.appender.file=org.apache.log4j.rolling.RollingFileAppender
log4j.appender.file.RollingPolicy.FileNamePattern=logs/log.%d{yyyyMMdd-HHmm}.log
log4j.appender.file.RollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy
log4j.appender.file.append=false
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
来源:https://stackoverflow.com/questions/45810301/apache-flink-rollingfileappender