org.slf4j.impl.StaticMDCBinder / No SLF4J providers were found.

SLF4J: Failed to load class "org.slf4j.impl.StaticMDCBinder".
SLF4J: Defaulting to no-operation MDCAdapter implementation.
SLF4J: See http://www.slf4j.org/codes.html#no_static_mdc_binder for further details.

SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.

 

이런 에러메세지가 나오면

 slf4j-nop.jar slf4j-simple.jar, slf4j-reload4j.jar, slf4j-jdk14.jar or logback-classic.jar 

 

이것 중에 아무거나 하나 추가해 주면 된다.

 

dependencies 에

runtimeOnly("org.slf4j:slf4j-simple:2.0.3")

 

이렇게 추가해주면 잘 동작한다.