Stalled system shutdown

[José Luis González]

Hi,

When shutting down, after upgrading to Debian 11, system shutdown hangs
(freezes) for some time (about 1-2 minutes) anytime, making it
bothersome to shut the system down.

The freeze happens afther the "Stopped target remote filesystems"
status line. After a while "A stop job is running for ntopng" is
printed with an "in progress" status in red and a timeout of 1 minute
30 seconds, which is exhausted. So everyt time I shut down I get a 1
minute and 30 seconds delay.

Anyone can help, please?

[Flacusbigotis]

Just a question to help you start troubleshooting: 

Does the shutdown finish quickly/quicker if you first stop the ntopng systemd service manually before doing the full shutdown?

[Tixy]

Do you have any network filesystems mounted? I've found that systemd
takes down the network connections before it unmounts disks, so if I
forget to unmount them before shutting down I get this delay.

--
Tixy

[Cindy Sue Causey]

Mine hangs because it's shutting down Firefox (Nightly from their
website these days).

Just as example, if I log out then log back in and run "ps aux|grep
firefox" after logouts that take a long time, there will most likely
be a long list of associated PIDs still in operation. If I try to
launch Firefox at that moment, it will most likely fail with an
advisement that a Firefox instance is already running. If I wait a few
more seconds then try again, Firefox will FINALLY have shut down the
rest of the way.

It's been ages since I first realized that was occurring. It was an
eye opener into that there's still a lot to learn about how operating
systems and their packages work under the hood. :)

Cindy :)
--
Cindy-Sue Causey
Talking Rock, Pickens County, Georgia, USA
* runs with birdseed *

[José Luis González]

On Thu, 10 Feb 2022 21:03:14 -0600
Flacusbigotis <flacus...@gmail.com> wrote:

> Just a question to help you start troubleshooting:
>
> Does the shutdown finish quickly/quicker if you first stop the ntopng
> systemd service manually before doing the full shutdown?

I did a "# service status ntopng" and it seems the daemon is dead and
it has errors:

=======

• ntopng.service - ntopng - High-Speed Web-based Traffic Analysis and Flow Collection Tool
Loaded: loaded (/lib/systemd/system/ntopng.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Fri 2022-02-11 11:24:19 CET; 2h 3min ago
Docs: man:ntopng(8)
file:/usr/share/doc/ntopng/README.Debian
file:/usr/share/doc/ntopng/UserGuide.pdf.gz
Process: 698 ExecStart=/usr/sbin/ntopng /etc/ntopng.conf (code=exited, status=0/SUCCESS)
CPU: 22ms

feb 11 11:24:19 tierra systemd[1]: Starting ntopng - High-Speed Web-based Traffic Analysis and Flow Collection Tool...
feb 11 11:24:19 tierra ntopng[698]: 11/Feb/2022 11:24:19 [Ntop.cpp:1902] Setting local networks to 127.0.0.0/8
feb 11 11:24:19 tierra ntopng[698]: 11/Feb/2022 11:24:19 [Redis.cpp:111] ERROR: ntopng requires redis server to be up and running
feb 11 11:24:19 tierra ntopng[698]: 11/Feb/2022 11:24:19 [Redis.cpp:112] ERROR: Please start it and try again or use -r
feb 11 11:24:19 tierra ntopng[698]: 11/Feb/2022 11:24:19 [Redis.cpp:113] ERROR: to specify a redis server other than the default
feb 11 11:24:19 tierra ntopng[698]: [Redis.cpp:111] ERROR: ntopng requires redis server to be up and running
feb 11 11:24:19 tierra ntopng[698]: [Redis.cpp:112] ERROR: Please start it and try again or use -r
feb 11 11:24:19 tierra ntopng[698]: [Redis.cpp:113] ERROR: to specify a redis server other than the default
feb 11 11:24:19 tierra systemd[1]: ntopng.service: Succeeded.
feb 11 11:24:19 tierra systemd[1]: Started ntopng - High-Speed Web-based Traffic Analysis and Flow Collection Tool.

=======

I wonder if the package ntopng is necessary for something. If I remove
it nothing else complains. I didn't know this package before.

By the way, with ntopng uninstalled my system shuts down normally.

Thanks for your help.

[Andrei POPESCU]

On Vi, 11 feb 22, 13:36:09, José Luis González wrote:
>
> I wonder if the package ntopng is necessary for something. If I remove
> it nothing else complains. I didn't know this package before.

At least on buster/arm64 nothing depends on it.

Was the package manually installed or does the description ring any
bells?

Kind regards,
Andrei
--
http://wiki.debian.org/FAQsFromDebianUser

[Flacusbigotis]

> I wonder if the package ntopng is necessary for something.

See manpage gor ntopng it's for monitoring network resources/activity.

So if you aren't interested in doing that  then you don't need it installed.

 

[José Luis González]

Yes, I have removed it.

Thanks all for your help.