Logstash problem

[Vasiliy]

Hello!

Could you please help me?  I use <version.wildfly.swarm>2018.5.0</version.wildfly.swarm>
and 

                <dependency>

<groupId>org.wildfly.swarm</groupId>

<artifactId>logstash</artifactId>

</dependency>

In my project-defaults.yml of JAX-RS application in uberJar I set:

 swarm:

  logstash:

    hostname: 172.25.199.175

    port: 5000

    level: INFO

    formatter-properties:

      index: app-shark

Connection with Logstash establish successfully. But sent JSON do not contain field "index" witch i need. What I doing wrong?

Thanks!