André Alves André Alves - 15 days ago 10
Java Question

NoSuchMethodError: com.google.common.util.concurrent.MoreExecutors.directExecutor conflits on Elastic Search jar

While creating Elasticsearch Client, I'm getting the exception java.lang.NoSuchMethodError: com.google.common.util.concurrent.MoreExecutors.directExecutor()Ljava/util/concurrent/Executor;
After some lookup, seams like the Guava-18 is being overwrite by an older version at runtime, and Guava-18 only works during compile task.

My Maven configuration is the follow:

<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>


How can i force the Guava-18 version at execution time?

Answer

You should try to find where the "old" version of guava is taken from and to exclude it once for all.

Find the dependency :

mvn dependency:tree | grep guava

Exclude it :

<dependency>
  <groupId>org.whatever</groupId>
  <artifactId>the_lib_that_includes_guava</artifactId>
  <version>0.97</version>
  <exclusions>
    <exclusion>
      <artifactId>com.google</artifactId>
      <groupId>guava</groupId>
    </exclusion>
  </exclusions>
</dependency>

See https://maven.apache.org/guides/introduction/introduction-to-optional-and-excludes-dependencies.html for more info on the dependency exclusion.