Properties coniguration format does not support per-logger properties

[mjrosenb]

Description

Attempt to configure a logger to add a property to logged messages using a Properties file ala https://github.com/apache/logging-log4j2/blob/rel/2.25.3/src/site/antora/modules/ROOT/examples/manual/configuration/logger-properties.properties

Configuration

Version: 2.25.3
Operating system: Ubuntu 24.04 LTS

JDK:

openjdk 21.0.4 2024-07-16 LTS
OpenJDK Runtime Environment Temurin-21.0.4+7 (build 21.0.4+7-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.4+7 (build 21.0.4+7-LTS, mixed mode, sharing)

Notes:

PropertiesConfigurationBuilder#createLogger is the function responsible for creating a logger from the list of properties. it extracts the fields "name", "includeLocation", "level", "type", "additivity", "appenderRef", and "filter". At the end of the function, properties contains three properties, .property.type, .property.name, and .property.value , which get dropped. Using the example xml configuration works properly.

Reproduction

This is in the Log4J2 manual already, I'm guessing tests aren't run on them?