Why docker container exits immediately

Question

I run a container in the background using

 docker run -d --name hadoop h_Service

it exits quickly. But if I run in the foreground, it works

Answer 1

This did the trick for me:

docker run -dit ubuntu

After it, I checked for the processes running using:

docker ps -a

For attaching again the container

docker attach CONTAINER_NAME

TIP: For exiting without stopping the container type: ^P^Q