Log4j2 isn´t working in JAX-RS servlet project on JBoss 7.4

I am working on a JAX-RS servlet project, which is deployed on JBoss (7.4) server, I want to implement Log4j2 (2.20) for application log handling, but when I use the info method, it does not show anything in the console or in the server.log file of the server.

I added the Log4j2 dependencies to lib folder on my project.

log4j-api-2.20.0.jar
log4j-core-2.20.0.jar

This is the configuration for Log4j2 in src\main\resources\log4j2.xml.

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
	<Appenders>
		<Console name="LogToConsole" target="SYSTEM_OUT">
			<PatternLayout pattern="%m%n" />
		</Console>
		<File name="LogToFile" fileName="${sys:jboss.server.log.dir}/server.log" append="true">
			<PatternLayout>
				<Pattern>%m%n</Pattern>
			</PatternLayout>
		</File>
	</Appenders>
	<Loggers>
		<Logger name="com.sematext.blog" level="info" additivity="true">
            <AppenderRef ref="LogToConsole"/>
        </Logger>
        <Root level="info">
            <AppenderRef ref="LogToFile"/>
        </Root>
	</Loggers>
</Configuration>

I excluded the JBoss logging subsystem in the src\main\webapp\WEB-INF\jboss-deployment-structure.xml file:

<jboss-deployment-structure>
	<deployment>
		<exclude-subsystems>
		    <subsystem name="logging" />
	    </exclude-subsystems>
	</deployment>
</jboss-deployment-structure>

This is the class where I'm using it.

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

public class ExampleServiceImpl implements ExampleService {

    private static final Logger LOGGER = LogManager.getLogger(ExampleServiceImpl.class);

    @GET
	@Path("/getListData")
	@Produces(MediaType.APPLICATION_JSON)
	@Override
	public ExampleResp getListData() {
        LOGGER.info("Inside of getListData method");
		ExampleDAOImpl exampleDAOImpl = new ExampleDAOImpl();
		ExampleResp resp = new ExampleResp();
		resp.setListData(exampleDAOImpl.getData());
		return resp;
	}

}

You do not want to try to use a different log manager which writes to the server.log. The two log managers could end up writing over the file which could result in missing or jumbled log messages.

There is log4j2-jboss-logmanager project which will write log4j2 log messages to the JBoss Log Manager. The module is already present in JBoss EAP 7.4. This means all you should need to do is:

1. Remove the jboss-deployment-structure.xml or at least remove module exclusions
2. Add the <scope>provided</scope> to the org.apache.logging:log4j-api Maven dependency
3. Remove the org.apache.logging:log4j-core

This does not support configuring log4j with a configuration file. It uses the configuration in the logging subsystem for configuration. However, given your configuration this should be fine.