Log4j2 RegexFilter pattern does not match

This happens because you have useRawMsg="true" switch it to useRawMsg="false". See the log4j2 manual:

If true the unformatted message will be used, otherwise the formatted message will be used. The default value is false.

EDIT:

I didn't look closely enough at your configuration and your output, so I apologize for that. The reason the RegexFilter does not work for you is that you're using it to try to filter based on the name of the logger. As per the log4j2 manual:

The RegexFilter allows the formatted or unformatted message to be compared against a regular expression.

To prevent a logger from logging any messages you have several options. I will illustrate one of them with some sample code below.

Here is a main class that runs a TimingFilter class:

package example;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class Main {

private static final Logger log = LogManager.getLogger();
    
    public static void main(String[] args){
        log.info("Here's some info!");
        log.error("Some erorr happened!");
        TimingFilter.main(null);
    }

}

Here is the TimingFilter class:

package example;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class TimingFilter {

    private static final Logger log = LogManager.getLogger();
    
    public static void main(String[] args){
        log.info("Here's some info!");
        log.error("Some erorr happened!");
    }
}

Here is a sample log4j2.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders> 
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout   pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n" />
        </Console>
    </Appenders>
    <Loggers>
        <Logger level="off" name="example.TimingFilter">
        </Logger>
        <Root level="info" additivity="false">
            <appender-ref ref="console" />
        </Root>
    </Loggers>
</Configuration>

Notice how I have configured the example.TimingFilter logger so that its level is "off". This prevents any logging from this logger.

When I run the Main class the output only contains messages from Main:

[INFO ] 2018-05-22 23:23:30.473 [main] Main - Here's some info!
[ERROR] 2018-05-22 23:23:30.474 [main] Main - Some erorr happened!