How does RollingFileAppender work with log4j2?

Question

I'm use to RollingFileAppender on normal log4j. Now I'm switching to log4j2, and cannot get the appender to work.

The File appender below works as expected. But the logging file for RollingFile is never created. Why?

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <File name="FILE" fileName="c:/logs.log">
            <PatternLayout pattern="%d %p %c: %m%n" />
        </File>

        <RollingFile name="ROLLING" fileName="c:/logsroll.log">
            <PatternLayout pattern="%d %p %c: %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="0.001 MB"/>
            </Policies>
            <DefaultRolloverStrategy max="10"/>
        </RollingFile>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="FILE" />
            <AppenderRef ref="ROLLING" />
        </Root>
    </Loggers>
</Configuration>

Answer 1

The RollingFile tag is missing a filePattern attribute.

<RollingFile name="ROLLING" 
             fileName="c:/logsroll.log"
             filePattern="c:/logsroll-%i.log">