title: I'm getting "NoClassDefFoundError: org/apache/logging/log4j/util/ReflectionUtil"
body: <p>I have the following dependencies in my build.gradle file.</p>
  
  <pre><code>compile 'org.slf4j:slf4j-api:1.7.25'
  compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.1'
  compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.11.1'
  </code></pre>
  
  <p>On running my unit tests, the following logs are displayed.</p>
  
  <pre><code>exclude patterns:SLF4J: Class path contains multiple SLF4J bindings.
  SLF4J: Found binding in 
  [jar:file:....gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-slf4j-impl/2.7/382b070836b8940a02d28c936974db95e9bfc3a4/log4j-slf4j-impl-2.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: Found binding in [jar:file:/Users/z002qz1/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-slf4j-impl/2.9.1/a97a849b18b3798c4af1a2ca5b10c66cef17e3a/log4j-slf4j-impl-2.9.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
  SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
  java.lang.NoClassDefFoundError: org/apache/logging/log4j/util/ReflectionUtil
  at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:42)
  at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
  at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
  at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
  </code></pre>
  
  <p>I'm using springboot 2.0.4.RELEASE. I'm hoping this is just some sort of version mismatch issue. Any insights are appreciated.</p>