log4j and JsonTemplateLayout

Recently, I had a problem with log4j that ended up being a dependency conflict, but as part of that, I used the log4j2.xml from https://logging.apache.org/log4j/2.x/manual/getting-started.html

<?xml version="1.0" encoding="UTF-8"?>
<Configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xmlns="https://logging.apache.org/xml/ns"
               xsi:schemaLocation="
                       https://logging.apache.org/xml/ns
                       https://logging.apache.org/xml/ns/log4j-config-2.xsd">

  <Appenders>
    <Console name="CONSOLE">
      <JsonTemplateLayout/>
    </Console>
  </Appenders>

  <Loggers>
    <Logger name="com.mycompany" level="INFO"/>
    <Root level="WARN">
      <AppenderRef ref="CONSOLE"/>
    </Root>
  </Loggers>

</Configuration>

And when I run it, I get the following message:

2024-12-11T15:13:49.167Z main ERROR Console contains an invalid element or attribute "JsonTemplateLayout"

I am on log4j 2.24.2. What should I use for my console appender since apache can't be depended on to give me the correct answer?

The example on the "Getting started" page uses JSON Template Layout. As most recently-added components, JTL is distributed as a separate Maven module: log4j-layout-template-json.

The exact dependencies you need to use the example configuration are documented in the How do I install Log4j Core to run my application?. Assuming you use log4j-bom in the dependency management section (which is recommended to prevent mismatched transitive dependencies), you need:

<!-- Logging implementation (Log4j Core) -->
<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-core</artifactId>
  <scope>runtime</scope>
</dependency>

<!-- Log4j JSON-encoding support -->
<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-layout-template-json</artifactId>
  <scope>runtime</scope>
</dependency>