I'm getting “NoClassDefFoundError: org/apache/logging/log4j/util/ReflectionUtil”

Question

I have the following dependencies in my build.gradle file.

compile \'org.slf4j:slf4j-api:1.7.25\'
compile group: \'org.apache.logging.log4j\', name: \'log4j-         


        

Answer 1

The error: java.lang.NoClassDefFoundError: org/apache/logging/log4j/util/ReflectionUtil

is because log4j2 since version 2.9.0 has been removed that class from api jar (log4j-api-2.x.x.jar).

The last version that has it, is 2.8.2

Probably you have mixed versions in the classpath.