Converting [this file](https://github.com/apache/logging-log4j2/blob/2.x/log4j-core-test/src/test/resources/log4j-rolling.properties) from `v1:properties` to `v2:xml` produces invalid configuration: ```shell $ java -jar ~/Downloads/log4j-transform-cli.jar config-file convert -i v2:properties -o v2:xml log4j-core-test/src/test/resources/log4j-rolling.properties output.xml ``` ```xml <?xml version="1.0" ?> <Configuration xmlns="https://logging.apache.org/xml/ns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-config-2.xsd" name="PropertiesConfigTest" status="error"> <Properties> <Property name="filename" value="target/rolling/rollingtest.log"/> </Properties> <ThresholdFilter level="debug"/> <Appenders> <Console name="STDOUT"> <PatternLayout pattern="%m%n"/> </Console> <RollingFile fileName="${filename}" filePattern="target/rolling2/test1-%d{MM-dd-yy-HH-mm-ss}-%i.log.gz" name="RollingFile"> <Policies> <TimeBasedTriggeringPolicy interval="2" modulate="true"/> <SizeBasedTriggeringPolicy size="100MB"/> </Policies> <PatternLayout pattern="%d %p %C{1.} [%t] %m%n"/> </RollingFile> <List filters="threshold" name="List"> <ThresholdFilter level="error"/> </List> </Appenders> <Loggers> <Root appenderRefs="stdout" level="info"> <AppenderRef ref="STDOUT"/> </Root> <Logger additivity="false" appenderRefs="rolling" level="debug" name="org.apache.logging.log4j.core.appender.rolling"> <AppenderRef ref="RollingFile"/> </Logger> </Loggers> </Configuration> ``` This results in a runtime warning: ``` [junit] 2025-08-04T21:49:33.638Z main ERROR Root contains an invalid element or attribute "appenderRefs" ``` I assume that `rootLogger.appenderRefs=...` is valid Log4j2 properties config syntax, since it appears in Log4j2's test corpus as well as various Google search results ([example](https://coderanch.com/t/785028/java/log-creating-logging-file-console)).