Docker dm_task_run failed error

Question

Today I first time installed docker on Fedora 21. Now, I need change location of docker images folder from default /var/lib/docker.

After copying files (devicemapper sub

Answer 1

As seen in issue 3721, this generally is a disk space issue.

The problem is that docker rmi doesn't always work in that case:

Getting this in v1.2 on CentOS 6.5 if a disk fills up before the image finishes pulling. Unable to rmi the incomplete image.

One "nuclear" option:

removing everything in /var/lib/docker worked out. Thanks

Another reason can be a common layer of fs to be downloaded between two images.