spring-boot: Elasticsearch starter forces use of Log4j2, breaking logging in apps that try to use Logback

I’m trying to run spring-boot-starter-data-elasticsearch in latest Milestone 2.0.0.M5.

I’ve used project template generated from start.spring.io. Here is the GitHub repo url: https://github.com/staleks/spring-boot-2.0.M5-ES

Run

1. $ ./gradlew clean build
2. $ ./gradlew bootRun

stale the process of loading application context. Please check the attached image: https://github.com/staleks/spring-boot-2.0.M5-ES/blob/master/images/staled-bootRun-process.png

On the other hand, if I switch back to 1.5.8.RELEASE version (GitHub repo url: https://github.com/staleks/spring-boot-1.5.8-ES)

Run

1. $ ./gradlew clean build
2. $ ./gradlew bootRun

application context is loaded, and web application is started. Please check the attached image: https://github.com/staleks/spring-boot-1.5.8-ES/blob/master/images/bootRun-process.png

Can someone please verify this?

Thank You