Versions problem with custom app and scdf

Question

I'm new to scdf, I've set up a local server, with the help of a guide text my docker-compose custom env with which it rises

services:
  dataflow-server:
    environment:
      - maven.remote-repositories.repo1.url=https://repo.maven.apache.org/maven2
      - maven.remote-repositories.springRepo.url=https://repo.maven.apache.org/maven2
      - maven.local-repository=/home/cnb/.m2/repository
      - JAVA_VERSION=17
      - BP_JVM_VERSION=-jdk17 
    volumes:
      - C:\Users\user\.m2:/home/cnb/.m2

  skipper-server:
    environment:
      - maven.remote-repositories.repo1.url=https://repo.maven.apache.org/maven2
      - maven.remote-repositories.springRepo.url=https://repo.maven.apache.org/maven2
      - maven.local-repository=/home/cnb/.m2/repository
      - JAVA_VERSION=17
      - BP_JVM_VERSION=-jdk17
    volumes:
      - C:\Users\user\.m2:/home/cnb/.m2

and yes, the problem is that when I register my custom stream app and start the deploy process, the stream gets the status "PARTIAL" and in the logs it says - Error: LinkageError occurred while loading main class org.springframework.boot.loader.JarLauncher java.lang.UnsupportedClassVersionError: org/springframework/boot/loader/JarLauncher has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0

the custom application uses java 17 and I don't understand what exactly it uses java 11 and why this error occurs, because as far as I know, scdf it must be different which versions the custom applications use, since they are independent. a custom application is a regular stream-processor jar that sits on my local machine

Answer 1

the problem was solved by changing the docker images:

springcloud/spring-cloud-skipper-server:2.9.2 -> springcloud/spring-cloud-skipper-server:2.9.2-SNAPSHOT-jdk17

springcloud/spring-cloud-dataflow-server:2.10.2 -> springcloud/spring-cloud-dataflow-server:2.10.2-jdk17