{"action":"created","issue":{"url":"https://api.github.com/repos/gmkurtzer/singularity/issues/204","repository_url":"https://api.github.com/repos/gmkurtzer/singularity","labels_url":"https://api.github.com/repos/gmkurtzer/singularity/issues/204/labels{/name}","comments_url":"https://api.github.com/repos/gmkurtzer/singularity/issues/204/comments","events_url":"https://api.github.com/repos/gmkurtzer/singularity/issues/204/events","html_url":"https://github.com/gmkurtzer/singularity/issues/204","id":174459183,"number":204,"title":"ERROR:  Could not virtualize PID namespace: Invalid argument","user":{"login":"fmc2478","id":21487570,"avatar_url":"https://avatars.githubusercontent.com/u/21487570?v=3","gravatar_id":"","url":"https://api.github.com/users/fmc2478","html_url":"https://github.com/fmc2478","followers_url":"https://api.github.com/users/fmc2478/followers","following_url":"https://api.github.com/users/fmc2478/following{/other_user}","gists_url":"https://api.github.com/users/fmc2478/gists{/gist_id}","starred_url":"https://api.github.com/users/fmc2478/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fmc2478/subscriptions","organizations_url":"https://api.github.com/users/fmc2478/orgs","repos_url":"https://api.github.com/users/fmc2478/repos","events_url":"https://api.github.com/users/fmc2478/events{/privacy}","received_events_url":"https://api.github.com/users/fmc2478/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2016-09-01T07:54:38Z","updated_at":"2016-09-01T19:14:47Z","closed_at":"2016-09-01T19:14:47Z","body":"Hello,\r\n\r\nI've compiled singularity 2.1.2 from source on two different hosts, both running redhat clones, although of different versions.  The compilation on both hosts was uneventful, and in both I used --prefix=/opt/singularity with the configure script.  On the host with a more recent kernel version (2.6.32-573.22.1.el6.x86_64), things seem to work...\r\n\r\n$ singularity shell container.img\r\nSingularity.container.img> $ cat /etc/debian_version\r\n8.5\r\nSingularity.container.img> $ exit\r\n/bin/sh: 2: Cannot set tty process group (No such process)\r\n$\r\n\r\n...while on the host with the older kernel version (2.6.32-220.23.1.bl6.Bull.28.8.x86_64), I run into this error when invoking singularity...\r\n\r\n$ singularity -v shell container.img\r\nincreasing verbosity level (2)\r\nExec'ing: /opt/singularity/libexec/singularity/cli/shell.exec container.img\r\nVERBOSE: Set messagelevel to: 2\r\nLOG    : Command=shell, Container=container.img, CWD=/panfs/vol/f/fachaud74, Arg1=(null)\r\nVERBOSE: Creating/Verifying session directory: /tmp/.singularity-session-7001.19.4214115159\r\nVERBOSE: Calculating image offset\r\nVERBOSE: Found valid loop device: /dev/loop0\r\nVERBOSE: Using loop device: /dev/loop0\r\nVERBOSE: Creating namespace process\r\nERROR  : Could not virtualize PID namespace: Invalid argument\r\nVERBOSE: Cleaning sessiondir: /tmp/.singularity-session-7001.19.4214115159\r\n$\r\n\r\nThe older host is running the equivalent of redhat 6.2 while the newer one is running stock 6.4.  Short of upgrading the OS on older host, is there anything I can do to get singularity to work?\r\n\r\nThank you.\r\nRegards,\r\nFaisal"},"comment":{"url":"https://api.github.com/repos/gmkurtzer/singularity/issues/comments/244182318","html_url":"https://github.com/gmkurtzer/singularity/issues/204#issuecomment-244182318","issue_url":"https://api.github.com/repos/gmkurtzer/singularity/issues/204","id":244182318,"user":{"login":"gmkurtzer","id":13984965,"avatar_url":"https://avatars.githubusercontent.com/u/13984965?v=3","gravatar_id":"","url":"https://api.github.com/users/gmkurtzer","html_url":"https://github.com/gmkurtzer","followers_url":"https://api.github.com/users/gmkurtzer/followers","following_url":"https://api.github.com/users/gmkurtzer/following{/other_user}","gists_url":"https://api.github.com/users/gmkurtzer/gists{/gist_id}","starred_url":"https://api.github.com/users/gmkurtzer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gmkurtzer/subscriptions","organizations_url":"https://api.github.com/users/gmkurtzer/orgs","repos_url":"https://api.github.com/users/gmkurtzer/repos","events_url":"https://api.github.com/users/gmkurtzer/events{/privacy}","received_events_url":"https://api.github.com/users/gmkurtzer/received_events","type":"User","site_admin":false},"created_at":"2016-09-01T19:14:47Z","updated_at":"2016-09-01T19:14:47Z","body":"My pleasure and please let me know if you have any other questions or problems.\r\n\r\nGreg"}}
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