[LOG4J2-2815] Allow composite configurations with Spring Boot

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.13.1
• Fix Version/s: 2.13.2
• Component/s: Configuration
• Assignee: Ralph Goers
• Reporter: Ralph Goers
• Created: 08/Apr/20 06:12
• Updated: 12/Apr/20 00:03
• Resolved: 11/Apr/20 23:55

Description

Spring Boot parses the value of the logging.config property in application.yml or bootstrap.yml as a URL. This prevents Log4j's normal method of using comma separated values. Since the only way to specify multiple urls in a single url is via query parameters, the Log4j Spring cloud support needs to be modified to allow for extra logging configuration locations to be provided using a query parameter named "override".