Issue

• Why docker service is not able to start and throws the message "Error getting container XXXX from driver devicemapper" in Red Hat Enterprise Linux 7 ?
• Docker service is not able to start and device mapper volume seems to be missing
• Dokcer service fails to start . Following messages are seen

root@XXX ~]# docker start 279b87d6087c
Error response from daemon: Cannot start container 279b87d6087c: Error getting container 279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07 from driver devicemapper: Error mounting '/dev/mapper/docker-253:1-33712577-279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07' on '/var/lib/docker/devicemapper/mnt/279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07': invalid argument
FATA[0000] Error: failed to start one or more containers

From the logs

Aug 05 17:45:18 XXXX docker[4306]: time="2015-08-05T17:45:18-04:00" level=error msg="Handler for POST /containers/{name:.*}/start returned error: Cannot start container 279b87d6087c: Error getting container 279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07 from driver devicemapper: Error mounting '/dev/mapper/docker-253:1-33712577-279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07' on '/var/lib/docker/devicemapper/mnt/279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07': invalid argument"
Aug 05 17:45:18 XXXX kernel: XFS (dm-7): unknown mount option [context].
Aug 05 17:45:18 XXXX docker[4306]: time="2015-08-05T17:45:18-04:00" level=error msg="HTTP Error: statusCode=500 Cannot start container 279b87d6087c: Error getting container 279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07 from driver devicemapper: Error mounting '/dev/mapper/docker-253:1-33712577-279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07' on '/var/lib/docker/devicemapper/mnt/279b87d6087c7f68da9a551b8401292ccd0438f4dfbeab73a5c8a23822c26e07': invalid argument"
Aug 05 17:45:18 XXXX kernel: XFS (dm-7): unknown mount option [context].

• Docker Service fails to start with the error unkown mount option [context]