log4j2-defaults.properties is not working since log4j 2 is always initialized by default

the code used to check initialization is shown below.

      val log4j2Initialized = !LogManager.getRootLogger
        .asInstanceOf[org.apache.logging.log4j.core.Logger].getAppenders.isEmpty

That works for log4j. However, log4j2 provides a default configuration so there is always a appender (ConsoleAppender) with error level.

reference from https://logging.apache.org/log4j/2.x/manual/configuration.html#AutomaticConfiguration

Log4j will provide a default configuration if it cannot locate a configuration file. The default configuration, provided in the DefaultConfiguration class, will set up:

• A ConsoleAppender attached to the root logger.
• A PatternLayout set to the pattern "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" attached to the ConsoleAppender

Note that by default Log4j assigns the root logger to Level.ERROR.