{"action":"created","issue":{"url":"https://api.github.com/repos/docker/docker/issues/14739","labels_url":"https://api.github.com/repos/docker/docker/issues/14739/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/14739/comments","events_url":"https://api.github.com/repos/docker/docker/issues/14739/events","html_url":"https://github.com/docker/docker/issues/14739","id":95911969,"number":14739,"title":"devicemapper under ubuntu flaky?","user":{"login":"newhook","id":10376697,"avatar_url":"https://avatars.githubusercontent.com/u/10376697?v=3","gravatar_id":"","url":"https://api.github.com/users/newhook","html_url":"https://github.com/newhook","followers_url":"https://api.github.com/users/newhook/followers","following_url":"https://api.github.com/users/newhook/following{/other_user}","gists_url":"https://api.github.com/users/newhook/gists{/gist_id}","starred_url":"https://api.github.com/users/newhook/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/newhook/subscriptions","organizations_url":"https://api.github.com/users/newhook/orgs","repos_url":"https://api.github.com/users/newhook/repos","events_url":"https://api.github.com/users/newhook/events{/privacy}","received_events_url":"https://api.github.com/users/newhook/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-07-19T12:26:08Z","updated_at":"2015-07-26T14:00:46Z","closed_at":"2015-07-26T11:38:35Z","body":"Since upgrading to docker 1.7.1 which made devicemapper the defualt graph driver under ubuntu 14.04.2 LTS I've noticed some strange failures. Here is the latest:\r\n\r\n```\r\n+ docker pull registry.customer.io:443/ruby_build\r\nlatest: Pulling from registry.customer.io:443/ruby_build\r\n511136ea3c5a: Already exists\r\n5bd56d818842: Already exists\r\nb21b50f44582: Already exists\r\n465cca257df8: Already exists\r\n62b5b5c398f7: Already exists\r\n4a65e9bf4f14: Already exists\r\n4a65e9bf4f14: Already exists\r\nDigest: sha256:954baf25bd0f4b954b244667cc8912a3ab812de11a4284086150a308f7d96f46\r\nStatus: Image is up to date for registry.customer.io:443/ruby_build:latest\r\n+ docker run -i --rm -v /home/deploy/deployed/jenkins/jobs/app/workspace:/source registry.customer.io:443/ruby_build\r\nError response from daemon: Cannot start container 33c51732316f6dde5645f2654abb35c1a1d938f41e1d50498e24e642e5e07572: Error getting container 33c51732316f6dde5645f2654abb35c1a1d938f41e1d50498e24e642e5e07572 from driver devicemapper: Error mounting '/dev/mapper/docker-9:3-97255531-33c51732316f6dde5645f2654abb35c1a1d938f41e1d50498e24e642e5e07572' on '/home/docker/devicemapper/mnt/33c51732316f6dde5645f2654abb35c1a1d938f41e1d50498e24e642e5e07572': no such file or directory\r\nBuild step 'Execute shell' marked build as failure\r\nFinished: FAILURE\r\n```\r\n\r\nI just tried this (6 hours later) and with NO changes everything is back to working? How can I help diagnose the root of this issue?\r\n\r\nOS: Ubuntu 14.04.2 LTS (GNU/Linux 3.14.32-xxxx-grs-ipv6-64 x86_64)\r\nDocker version: 1.7.1 (from lxc-docker-1.7.1)."},"comment":{"url":"https://api.github.com/repos/docker/docker/issues/comments/124991172","html_url":"https://github.com/docker/docker/issues/14739#issuecomment-124991172","issue_url":"https://api.github.com/repos/docker/docker/issues/14739","id":124991172,"user":{"login":"thaJeztah","id":1804568,"avatar_url":"https://avatars.githubusercontent.com/u/1804568?v=3","gravatar_id":"","url":"https://api.github.com/users/thaJeztah","html_url":"https://github.com/thaJeztah","followers_url":"https://api.github.com/users/thaJeztah/followers","following_url":"https://api.github.com/users/thaJeztah/following{/other_user}","gists_url":"https://api.github.com/users/thaJeztah/gists{/gist_id}","starred_url":"https://api.github.com/users/thaJeztah/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/thaJeztah/subscriptions","organizations_url":"https://api.github.com/users/thaJeztah/orgs","repos_url":"https://api.github.com/users/thaJeztah/repos","events_url":"https://api.github.com/users/thaJeztah/events{/privacy}","received_events_url":"https://api.github.com/users/thaJeztah/received_events","type":"User","site_admin":false},"created_at":"2015-07-26T14:00:46Z","updated_at":"2015-07-26T14:00:46Z","body":"Thanks @newhook, good to hear you managed to resolve it. Reading the linked issue, I agree that the description in the changelog is cryptic and doesn't cover the possible consequences. It may be \"late to the party\", but perhaps you have a suggestion on how to improve that and are willing to create a pull request to update the CHANGELOG.md?"}}