log4j-core-test/src/test/resources/missingRootLogger.xml

<?xml version="1.0" encoding="UTF-8"?>
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  ~ contributor license agreements.  See the NOTICE file distributed with
  ~ this work for additional information regarding copyright ownership.
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  ~ (the "License"); you may not use this file except in compliance with
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  ~      http://www.apache.org/licenses/LICENSE-2.0
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  -->
<Configuration name="MissingRootTest">
  <Appenders>
    <List name="List">
      <PatternLayout>
        <Pattern>%d %p %c{1.} [%t] %X{aKey} %location %m %ex%n</Pattern>
      </PatternLayout>
    </List>
  </Appenders>

<!--
    This test intentionally excludes a root logger configuration. This is to demonstrate that by default, the root
    logger is configured as a Logger at the ERROR level with only a ConsoleAppender. Thus, the following would be
    implicit in a configuration that doesn't otherwise specify the root logger configuration:

    <Appenders>
      <Console name="Console">
        <PatternLayout pattern="{the default pattern}"/>
      </Console>
    </Appenders>

    <Loggers>
      <Root level="error">
        <AppenderRef ref="Console"/>
      </Root>
    </Loggers>
-->
  <Loggers>
    <Logger name="sample" level="info" includeLocation="false">
      <AppenderRef ref="List"/>
    </Logger>
  </Loggers>
</Configuration>