logback-server.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Logging config for server deploys, with automatic date based log rollover -->

<configuration>
    <!-- Enable JMX-based changing of log levels, reloading of config, etc. -->
    <jmxConfigurator />

    <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--See http://logback.qos.ch/manual/appenders.html#RollingFileAppender-->
        <!--and http://logback.qos.ch/manual/appenders.html#TimeBasedRollingPolicy-->
        <!--for further documentation-->

        <!-- This is where the current log file is written -->
        <file>${LOG_DIR}/spark-job-server.log</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover -->
            <fileNamePattern>${LOG_DIR}/spark-job-server.%d{yyyy-MM-dd}.log</fileNamePattern>

            <!-- keep 30 days' worth of history -->
            <maxHistory>30</maxHistory>
        </rollingPolicy>

    <encoder>
      <pattern>[%date{ISO8601}] %-5level %logger{20} [%X{jobId}] [%X{akkaSource}] - %msg%n</pattern>
    </encoder>
    </appender>
    <root level="info">
        <appender-ref ref="file"/>
    </root>
</configuration>