Automatic addition of the OTel Logback appender by the OTel starter

[jeanbisutti]

With this PR the OTel starter automatically adds the OTel Logback appender if the appender is not configured in an XML file

[denodaeus]

How can I prevent this from "automagically" breaking my app if I choose to not use logback but instead something like log4j2?

I've followed the instructions for adding log4j2 as the log appender, but I continuously get this "magic":

22:05:06.622 [main] ERROR com.my.app.MyApplication - PortfolioManagementServiceApplication failed to start
java.lang.IllegalArgumentException: Cannot instantiate interface org.springframework.context.ApplicationListener : io.opentelemetry.instrumentation.spring.autoconfigure.instrumentation.logging.LogbackAppenderApplicationListener
at org.springframework.boot.SpringApplication.createSpringFactoriesInstances(SpringApplication.java:449) ~[spring-boot-2.7.8.jar:2.7.8]

[trask]

java.lang.IllegalArgumentException: Cannot instantiate interface org.springframework.context.ApplicationListener : io.opentelemetry.instrumentation.spring.autoconfigure.instrumentation.logging.LogbackAppenderApplicationListener

hi @denodaeus! can you open a new issue for this so that it's not lost? thanks