DatabaseInitializerDetector and DependsOnDatabaseInitializationDetector implementations may be instantiated with the wrong ClassLoader

[jaminh]

I'm sorry this is becoming a game of whack-a-mole but I have found another instance of an alternate classloader not being propagated properly similar to #27133.

The offending line can be found here:

spring-boot/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/sql/init/dependency/DatabaseInitializationDependencyConfigurer.java

Line 165 in dfe91be

return instantiator.instantiate(names);

This is leading to a ClassNotFound exception on the FlywayDatabaseInitializerDetector class.

[jaminh]

It appears after this fix I was able to get spring boot running with an alternate classloader. The only small issue outstanding is the LoggingSystemShutdownListener in the spring cloud project. I am able to work around that issue but I proposed a fix here spring-cloud/spring-cloud-commons#972.