Using log4j2 with slf4j: java.lang.StackOverflowError

You’re creating a call-loop with log4j-slf4j-impl-2.3.jar and log4j-to-slf4j-2.3.jar.

log4j-slf4j-impl-2.3.jar is the implementation of the adapter that sends slf4j calls to log4j.

log4j-to-slf4j-2.3.jar is sending log4j calls right back to slf4j. Remove this one.

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