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Bug 1860899

Summary: Annoying notice messages "Killing process PID (systemctl) with signal SIGKILL."
Product: Red Hat Enterprise Linux 8 Reporter: Renaud Métrich <rmetrich>
Component: systemdAssignee: David Tardon <dtardon>
Status: CLOSED ERRATA QA Contact: Frantisek Sumsal <fsumsal>
Severity: low Docs Contact:
Priority: low    
Version: 8.2CC: alex, dtardon, h1k6zn2m, kai, peter.vreman, systemd-maint-list
Target Milestone: rcKeywords: Bugfix, Triaged
Target Release: 8.0Flags: pm-rhel: mirror+
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: systemd-239-54.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-05-10 15:25:47 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Renaud Métrich 2020-07-27 11:38:56 UTC
Description of problem:

With RHEL8, "systemd --user" instance spawns when a user slice is created. Upon user slice destruction, a "systemctl --user --force exit" command is executed.
Due to race condition, systemd (PID 1) kills the "systemctl" command above and print a message at NOTICE level, which pollutes the logs.


Version-Release number of selected component (if applicable):

systemd-239-31.el8_2.2


How reproducible:

Almost Always


Steps to Reproduce:
1. Login using ssh as a non-logged in user

  # ssh <user>@vm-rhel8 true

2. Check the journal

  # journalctl -p notice -u user@<userid>.service --follow

Actual results:

Jul 27 13:34:20 vm-rhel8 systemd[1]: user@<userid>.service: Killing process 2891 (systemctl) with signal SIGKILL.


Expected results:

No message, or at least at INFO level max


Additional info:

This seems due to a race condition when closing the last session: systemd(1) still sees the "systemctl --user --force exit" command which makes "systemd --user" exit and wait for it to exit.
A solution may be to use "systemctl --user --force --no-block exit" instead.

Comment 6 Plumber Bot 2021-08-31 08:24:56 UTC
fix merged to github master branch -> https://github.com/redhat-plumbers/systemd-rhel8/pull/136

Comment 10 Plumber Bot 2021-11-27 22:46:02 UTC
fix merged to github master branch ->

Comment 11 Plumber Bot 2021-11-30 09:36:06 UTC
fix merged to github master branch -> https://github.com/redhat-plumbers/systemd-rhel8/pull/236

Comment 16 errata-xmlrpc 2022-05-10 15:25:47 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (systemd bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2069