When using springboot with
elasticsearch, you need to be explicit with some transitive dependencies as SpringBoot declares a version 6.4...
Basically you can put this in your pom.xml:
<properties>
<elasticsearch.version>7.3.0<elasticsearch.version>
</properties>
See documentation here: https://docs.spring.io/spring-boot/docs/current/reference/html/howto-build.html#howto-customize-dependency-versions
Might not be the problem here though.