logback.xml

<configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/enricopulatzo/logback-XSD/master/src/main/xsd/logback.xsd">

    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{yyyy-mm-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <appender name="hazelcast-file" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/hazelcast.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover -->
            <fileNamePattern>logs/hazelcast.${PID}.%d{yyyy-MM-dd}.log</fileNamePattern>

            <!-- keep 30 days' worth of history -->
            <maxHistory>10</maxHistory>
        </rollingPolicy>

        <encoder>
            <pattern>%d{yyyy-mm-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <logger name="com.netflix.config.source.ZooKeeperConfigurationSource" level="INFO">
        <appender-ref ref="stdout"/>
    </logger>

    <logger name="com.hazelcast" level="INFO">
        <appender-ref ref="hazelcast-file"/>
    </logger>

    <!-- Print retries -->
    <logger name="com.netflix.client.AsyncLoadBalancingClient" level="DEBUG">
        <appender-ref ref="stdout"/>
    </logger>

    <root level="info">
        <appender-ref ref="stdout" />
    </root>
</configuration>