[LOG4J2-986] PatternLayout doesn't print "[%level]

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.2
• Component/s: Core

Environment

Netbeans 8.0.2

• Assignee: Unassigned
• Reporter: Olivier Grégoire
• Created: 26/Mar/15 11:50
• Updated: 26/Mar/15 21:48
• Resolved: 26/Mar/15 20:41

Description

This configuration

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="[%level] %message%exception{short}%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="trace">
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

And this unit test:

Log4j2Test.java

import org.apache.logging.log4j.LogManager;
import org.junit.Test;
public class Log4j2Test {
  @Test public void testLogging() {
    LogManager.getLogger().info("expecting [INFO]", new RuntimeException());
  }
}

Result in the following:

expecting [INFO] java.lang.RuntimeException
    at Log4j2Test.testLogging(Log4j2Test.java:19)

I would expect:

[INFO] expecting [INFO] java.lang.RuntimeException
    at Log4j2Test.testLogging(Log4j2Test.java:19)

I found this issue in 2.1 and I reproduced it in 2.2.

Note: similar patterns like the following work as expected.

[%-5level] %message%exception{short}%n
%level %message%exception{short}%n