This step is necessary so all remaining coverage is uploaded when your application is shut down.

By default, the agent sends the coverage it collected when the JVM inside your Docker container is shut down. This requires that the JVM receives the SIGTERM signal sent by your orchestration tooling. Thus, you'll need to ensure that the JVM is the main process inside the docker image. This can be achieved by using exec to replace the shell process with your JVM process:

# this will not work:
CMD java -jar /your.jar

# use this instead:
CMD exec java -jar /your.jar

The same applies if you're using ENTRYPOINT instead of CMD:

# this will not work:
ENTRYPOINT java -jar /your.jar

# use this instead:
ENTRYPOINT exec java -jar /your.jar

If your application is wrapped inside a start script, you'll likewise need to ensure that you use exec to replace the shell process with the JVM process.