import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class A {

    // log4j2 logger
    private static final Logger logger = LogManager.getLogger(Main.class.getName());

}

logger.trace("some message");
    logger.info("another message");

log4j-api-2.5.jar
log4j-core-2.5.jar

<dependencies>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.5</version>
    </dependency>

java -jar myapp.jar

<plugins>
    <!-- Maven Shade Plugin -->
    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>2.4.3</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <transformers>
                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <mainClass>com.distributed.analyzer.Main</mainClass>
                </transformer>
              </transformers>
            </configuration>
          </execution>
        </executions>
  </plugin>
</plugins>

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager
        at com.distributed.analyzer.Main.<clinit>(Main.java:22)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager

        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 1 more