On 5-12-14 15:11:46 Michal Sekletar wrote: > On Sat, May 10, 2014 at 05:12:21PM -0400, Garry T. Williams wrote: > > This recently stated showing up in the journal on Fedora F20 here: > > > > May 10 17:01:01 vfr systemd[1]: Failed to mark scope session-20.scope > > as abandoned : Stale file handle > > I suspect this is caused by race between systemd realizing that > cgroup for a scope is empty, thus changing its state, and > dispatching dbus message coming from logind where it asks systemd to > mark scope as abandoned. I don't think this is a big deal so we > could log this only if debug is on. > > To make sure if it is the case can you try to reproduce with systemd > and logind debug turned on. Thanks!
Heh. Reproducing was an interesting problem. Based on your suspicion, I created a crontab to run a couple of logger(1) commands every minute and then tried to create a lot of I/O on the system in the hope that I could recreate the race. Luckily, I caught it. I see systemd[1]: session-45.scope changed running -> dead systemd[1]: Collecting session-45.scope happening in the log before systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Scope.Abandon() on /org/freedesktop/systemd1/unit/session_2d45_2escope systemd[1]: Failed to mark scope session-45.scope as abandoned : Stale file handle Is that the race? systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: :1.117 org.freedesktop.login1.Manager CreateSession systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Manager.StartTransientUnit() on /org/freedesktop/systemd1 systemd[1]: Failed to load configuration for session-45.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=start path=(null) cmdline=(null): 0 systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:object_r:systemd_unit_file_t:s0 tclass=service perm=start path=/run/systemd/system/session-45.scope cmdline=(null): 0 systemd[1]: Trying to enqueue job session-45.scope/start/fail systemd[1]: Installed new job session-45.scope/start as 3401 systemd[1]: Enqueued job session-45.scope/start as 3401 systemd[1]: Starting Session 45 of user garry. systemd[1]: session-45.scope changed dead -> running systemd[1]: Job session-45.scope/start finished, result=done systemd[1]: Started Session 45 of user garry. systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd-logind[654]: New session 45 of user garry. systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: :1.118 org.freedesktop.login1.Manager CreateSession systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Manager.StartTransientUnit() on /org/freedesktop/systemd1 systemd[1]: Failed to load configuration for session-44.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=start path=(null) cmdline=(null): 0 systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:object_r:systemd_unit_file_t:s0 tclass=service perm=start path=/run/systemd/system/session-44.scope cmdline=(null): 0 systemd[1]: Trying to enqueue job session-44.scope/start/fail systemd[1]: Installed new job session-44.scope/start as 3407 systemd[1]: Enqueued job session-44.scope/start as 3407 systemd[1]: Starting Session 44 of user garry. systemd-logind[654]: New session 44 of user garry. systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager JobRemoved systemd[1]: session-44.scope changed dead -> running systemd[1]: Job session-44.scope/start finished, result=done systemd[1]: Started Session 44 of user garry. systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager JobRemoved systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: :1.119 org.freedesktop.login1.Manager ReleaseSession systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Scope.Abandon() on /org/freedesktop/systemd1/unit/session_2d44_2escope systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:object_r:systemd_unit_file_t:s0 tclass=service perm=status path=/run/systemd/system/session-44.scope cmdline=(null): 0 systemd[1]: session-44.scope: cgroup is empty systemd[1]: session-44.scope changed running -> dead systemd[1]: Collecting session-44.scope systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd[1]: Received SIGCHLD from PID 5846 (logger). systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd-logind[654]: Got message: :1.120 org.freedesktop.login1.Manager ReleaseSession systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd[1]: Child 5846 (logger) died (code=exited, status=0/SUCCESS) systemd[1]: Accepted connection on private bus. systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.Get() on /org/freedesktop/systemd1/unit/session_2d44_2escope systemd[1]: Failed to load configuration for session-44.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=status path=(null) cmdline=(null): 0 systemd[1]: Collecting session-44.scope systemd[1]: Got D-Bus request: org.freedesktop.DBus.NameOwnerChanged() on /org/freedesktop/DBus systemd[1]: Accepted connection on private bus. systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Agent.Released() on /org/freedesktop/systemd1/agent systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.Get() on /org/freedesktop/systemd1/unit/session_2d44_2escope systemd[1]: Failed to load configuration for session-44.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=status path=(null) cmdline=(null): 0 systemd[1]: Collecting session-44.scope systemd-logind[654]: Removed session 44. systemd[1]: Got D-Bus request: org.freedesktop.DBus.Local.Disconnected() on /org/freedesktop/DBus/Local systemd-logind[654]: Got message: org.freedesktop.DBus org.freedesktop.DBus NameOwnerChanged systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Agent.Released() on /org/freedesktop/systemd1/agent systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd[1]: session-45.scope: cgroup is empty systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd[1]: session-45.scope changed running -> dead systemd[1]: Collecting session-45.scope systemd[1]: Failed to load configuration for session-45.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=status path=(null) cmdline=(null): 0 CROND[5843]: (garry) CMD (exec logger 'this is a test 2'&) CROND[5845]: (garry) CMD (exec logger 'this is a test'&) garry[5846]: this is a test garry[5844]: this is a test 2 systemd[1]: Child 5844 (logger) died (code=exited, status=0/SUCCESS) systemd[1]: Got D-Bus request: org.freedesktop.DBus.Local.Disconnected() on /org/freedesktop/DBus/Local systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Scope.Abandon() on /org/freedesktop/systemd1/unit/session_2d45_2escope systemd[1]: Failed to mark scope session-45.scope as abandoned : Stale file handle systemd[1]: Collecting session-45.scope systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.Get() on /org/freedesktop/systemd1/unit/session_2d45_2escope systemd[1]: Failed to load configuration for session-45.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=status path=(null) cmdline=(null): 0 systemd[1]: Collecting session-45.scope systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.Get() on /org/freedesktop/systemd1/unit/session_2d45_2escope systemd[1]: Failed to load configuration for session-45.scope: No such file or directory systemd[1]: SELinux access check scon=system_u:system_r:systemd_logind_t:s0 tcon=system_u:system_r:init_t:s0 tclass=service perm=status path=(null) cmdline=(null): 0 systemd[1]: Collecting session-45.scope systemd-logind[654]: Removed session 45. systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved systemd-logind[654]: Got message: :1.2 org.freedesktop.systemd1.Manager UnitRemoved -- Garry T. 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