On Wed, 4 Dec 2019 13:44:42 +0530 Vikram Goyal <vikigoyal@xxxxxxxxx> wrote: > Hi, > > I am facing a peculiar issue where a system reboot sometimes & not > always posts a crash in last output. > > root pts/0 Wed Dec 4 11:47 still logged in > reboot system boot Wed Dec 4 11:30 - 11:57 (00:26) > root pts/0 Tue Dec 3 18:14 - crash (17:16) > reboot system boot Tue Dec 3 10:03 - 11:57 (1+01:53) > root pts/0 Mon Dec 2 18:03 - down (15:56) > reboot system boot Mon Dec 2 11:19 - 10:00 (22:40) > root pts/0 Sat Nov 30 17:22 - crash (1+17:57) > reboot system boot Sat Nov 30 10:36 - 10:00 (2+23:24) > root pts/0 Fri Nov 29 17:35 - down (16:56 > > I then created an alias - alias reboot='sync && sleep 3s && sync && > sleep 3s && /usr/bin/systemctl reboot' [snip] > journal entries do not show any errors, but it is recorded as crash in > last since there's no entry of - shutdown system down - in last. > > last records sometimes a proper shutdown, many times as crash even > though the reboot is done similarly all the times. > > What could be the issue or should I be concerned about it. This sounds like a race condition. Since systemd runs things in parallel instead of in sequence, variations in processing time can run things in different order each time. If this means that dependencies are stopped before the programs that depend on them, those programs will crash. That is what I think is happening here. So, I would consider this innocuous, a side effect of the way shutdown occurs. However, this is just speculation, and I have no special knowledge that indicates it is true. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
