[LOG4J2-3634] Log4JBridgeHandler & Tomcat Webapps: Propagating log levels leads to no handlers in the (root) logger

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.19.0
• Fix Version/s: 2.20.0
• Component/s: JUL adapter

Environment

Apache Tomcat 9.0.68

JDK Corretto 18

macOS 12.6.1 aarch64

• External issue URL: https://github.com/apache/logging-log4j2/pull/1140
• Assignee: Piotr Karwasz
• Reporter: Marcel Koch
• Created: 14/Nov/22 13:11
• Updated: 02/Jan/23 06:30
• Resolved: 29/Nov/22 10:57

Description

In short: The loggers are altered before the handlers are added to the (root) logger. This leads to propers loggers but without any handler.

My idea would be to move the propagation to a later point in time. So, I moved it to the method publish(). 

Here is demo repo to reproduce the issue: https://github.com/mknet/tomcat-webapp-log4j-jul-bridge

Here is the Pull Request with my approach to fix the issue: https://github.com/apache/logging-log4j2/pull/1140

Issue Links

• links to: GitHub Pull Request #1140