LOG Configuration in Spring-Boot

Question

I have configured my logback.xml as bellow but I am getting error at run time please any one help me to figure out.

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="LOG_DIR" value="D:\\FlightReserVAtionProject\\LOG"> 

<appender name="FILE"
    class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_DIR}\\${FILE_PREFIX}.log</file>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        <pattern>$%d{yyyy-MM-dd HH:mm:ss} - %msg%n</pattern>
    </encoder>

    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <fileNamePattern>${LOG_DIR}\\archived\\${FILE_PREFIX}.$%d{yyyy-MM-dd
            HH:mm:ss}.%i.log</fileNamePattern>
        <timeBasedFileNamingAndTriggeringPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"></timeBasedFileNamingAndTriggeringPolicy>
        <maxFileSize>2MB</maxFileSize>
    </rollingPolicy>

</appender>
</configuration>

The error is

java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.joran.spi.Interpreter@18:17 - no applicable action for[maxFileSize], current ElementPath  is [[configuration][appender[rollingPolicy][maxFileSize]]ERROR in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@20f5281c - maxFileSize property is mandatory.

Answer 1

Change your configuration as below. maxFileSize is a sub property of tag timeBasedFileNamingAndTriggeringPolicy .

<timeBasedFileNamingAndTriggeringPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
        <maxFileSize>2MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>