While implementing the changes to enable the busy node avoidance we found an issue with the jar. The logback-test.xml file is packaged with the Datastax java-driver-policies jar. When starting up the Spring Boot 2.7 application the logback-spring.xml on the classpath is ignored and logback-test.xml is used. The effect is that we loose ALL logging (Splunk, Disk etc).
Perhaps you can inform the engineers on your end to remove that file for other customers. I do not see a reason why the logback-test.xml should be there, perhaps an oversight.
Their work-around fix was setting the logging.config property to the classpath. So in this case -Dlogging.config=classpath:logback-spring.xml is put on the command line
From a development-team: