After stopping container with "docker stop containerID", you can't start it again

When running a "docker start containerID", it just exits after a second and stopping itself, when consulting logs, it says

httpd (pid 6) already running

According to this blog entry

According to the Apache documentation a SIGTERM will cause the server to immediately exit and terminate any in-progress requests, so you may not want to use docker stop on an Apache container

So, after some research, you have to send a "docker kill" with a SIGWINCH to apache PID to get a gracefull stop, but this is not very nice

A solution that I can think of, is deleting the .pid file after each start of the container (it's not fixing the not "gracefully" apache stop, but at least you will be able to start the container again

Cheers