There is something weird. This actually works.
It does not work though if I use the shaded REST client.
The shaded REST client is just the same REST client but with classes moved to other packages. I had to introduce this as i already have the old ES client in my app and the new and the old client have overlapping classes.
This is the only thing i have in my pom.xml for the shaded version
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<phase>package</phase>
<goals><goal>shade</goal></goals>
<configuration>
<relocations>
<relocation>
<pattern>org.elasticsearch</pattern>
<shadedPattern>org.elasticsearch.${package.path}</shadedPattern>
</relocation>
<relocation>
<pattern>org.apache.lucene</pattern>
<shadedPattern>hidden.org.apache.lucene</shadedPattern>
</relocation>
<relocation>
<pattern>org.apache.http</pattern>
<shadedPattern>hidden.org.apache.http</shadedPattern>
</relocation>
<relocation>
<pattern>org.apache.logging</pattern>
<shadedPattern>hidden.org.apache.logging</shadedPattern>
</relocation>
<relocation>
<pattern>org.apache.commons.codec</pattern>
<shadedPattern>hidden.org.apache.commons.codec</shadedPattern>
</relocation>
<relocation>
<pattern>org.apache.commons.logging</pattern>
<shadedPattern>hidden.org.apache.commons.logging</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>