hello, I create a springboot project by https://start.spring.io/,and then i add logback jar in pom file.i create a logback.xml in resources/config/ and add logging.config=classpath:config/logback.xml ,look this pic image.png start via war package,I found that the configuration in yml cannot be recognized.look at it: image.png I found this related to tomcat version.tomcat 8.5.46 and below will have problems, but 8.5.55 and above are no problem.

Comment From: wilkinsona

Tomcat used to set a LOGGING_CONFIG environment variable. This would override logging.config but it was changed in Tomcat 8.5.54:

Deprecated the LOGGING_CONFIG environment variable and replace it with the CATALINA_LOGGING_CONFIG environment variable to avoid clashes with other components that use LOGGING_CONFIG. (markt)

You should upgrade to Tomcat 8.5.54 or later.

Comment From: fzustone

Thank you for your reply