Q: What are spring-boot supported versions for log4j? Can I know about what are the spring-boot supported versions for log4j. Because I use spring-boot version 1.5.9. It is already support for log4j2 and I want to know what is the latest version that support for log4j.

A: All latest versions of Spring Boot supports log4j2.
Current version of Spring Boot 2.0.0 supports log4j2 version 2.10.0. You can verify other dependency versions from here. 
