[LOG4J2-1572] Empty NDC stack logs null

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Duplicate
• Affects Version/s: 2.6.2
• Fix Version/s: 2.7
• Assignee: Mikael Ståldal
• Reporter: Johno Crawford
• Created: 09/Sep/16 08:03
• Updated: 15/Sep/16 10:54
• Resolved: 15/Sep/16 09:48

Description

Expected behavior

When the NDC stack is empty nothing should be logged (regression in log4j 2.x, the functionality behaves this way in log4j 1.2).

ex. 2016-09-09 09:54:44,212 INFO [main] Main (Main.java:6) - huuhaa

Actual behavior

When the NDC stack is empty null is logged.

ex. 2016-09-09 09:54:44,212 INFO [main] Main (Main.java:6) - huuhaa null

import org.apache.logging.log4j.LogManager;

public class Main {

    public static void main(String[] args) {
        LogManager.getLogger(Main.class).info("huuhaa");
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>
    <Console name="STDOUT" target="SYSTEM_OUT">
      <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m %x%n"/>
    </Console>
  </Appenders>
  <Loggers>
    <Root level="INFO">
      <AppenderRef ref="STDOUT"/>
    </Root>
  </Loggers>
</Configuration>

Issue Links

• duplicates: LOG4J2-1530 LogEvent.getContextStack() can return null