dockerhub - Docker push already in progress -

i interrupted following command : docker push <user>/docker-whale.

if try running again, :

error response daemon: push <user>/docker-whale in progress 

i understand upload still running in background , interrupted client output. however, is there way back?

also, if it's somehow stuck, how restart push operation?

this happens because stopped pushing before finished. don't need remove containers; restart boot2docker(or docker service).

command maybe:      boot2docker restart (on mac)     service docker restart (on linux) 

after that, can push image again, luck!