I have few volumes created with the vieux/sshfs driver, and i create some containers which mount one of these volumes.

The containers spawned by the services execute a single script, after which the container finishes/exits. The comman may like this:
"docker run --rm -v {ssh_volume_name}:/home/data --entrypoint='pwd' {image_name}"

All works smooth, except that there is exceptionally 4 zombie processes accumulated in the host machine everytime exec "docker run".
I use "ps -ef" , i find this:

I dont't know why and how can i do to avoid this. Please help!