src/main/resources/logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true" scan="true">
    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>${com.sun.aas.instanceRoot}/logs/mdm5.log</file>
        <append>true</append>
        <encoder>
            <Pattern>%date [%thread] %-5level %logger{36} - %msg%n</Pattern>
        </encoder>
    </appender>
    <root>
        <level value="INFO"/>
        <appender-ref ref="FILE"/>
    </root>
</configuration>