<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n" />
        </Console>
        <File name="basic" fileName="log/log.log">
            <PatternLayout
                pattern="%d{dd/MM/yy HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n" />
        </File>

        <appender name="RollingAppender" class="org.apache.log4j.DailyRollingFileAppender">
            <param name="File" value="log/logs/log" />
            <param name="DatePattern" value="'.'yyyyMM'.log'" />
            <PatternLayout
                pattern="%d{dd/MM/yy HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n" />
        </appender>

    </Appenders>
    <Loggers>
        <Root level="WARN">
            <AppenderRef ref="console" />
        </Root>
        <Logger name="sistema" level="ALL" additivity="true">
            <AppenderRef ref="basic" />
        </Logger>
        <Logger name="sistemabis" level="ALL" additivity="true">
            <AppenderRef ref="RollingAppender" />
        </Logger>

    </Loggers>
</Configuration>

[details ...] Error processing element appender ([Appenders: null]): CLASS_NOT_FOUND
[details ...] Unable to locate appender "RollingAppender" for logger config "sistemabis"