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I want to generate half-daily log files through log4j2 configuration. I have given :

<RollingFile name="fileAppender" filename ="${logName} append="true" 
    FilePattern="${logName}. %d{yyyy-MM-dd-a}">

And also defined:

<Policies>
    <TimeBasedTriggeringPolicy interval="1" 
        Module="true"/>

But i am getting only AM log in this way though i want it to be something :

a.log.2016-03-23-AM
b.log.2016-03-23-PM

Can somebody help me out in the same?

sazzad
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Sheetal Dorby
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1 Answers1

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You can use the CronTriggeringPolicy for this. I borrowed the expression from the answer at Cron Expression (Quartz) for a program to run every midnight at 12 am for the actual expression to use.

<RollingFile name="fileAppender" filename ="${logName} append="true" FilePattern="${logName}.$$d{yyyy-MM-dd-a}">
    <CronTriggeringPolicy schedule="0 0 0,12 * * ?" />
</RollingFile>
Community
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rgoers
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    In the link you only find the normal CronExpression. For log4j CronExpression see [CronExpression(Apache)](https://logging.apache.org/log4j/log4j-2.7/log4j-core/apidocs/org/apache/logging/log4j/core/util/CronExpression.html). Difference here is that in Apache there are seconds as well. – Momo Jul 12 '18 at 09:21