[Nut-upsuser] Upssched 100% CPU after updating Debian 12

Tue Jun 13 14:41:54 BST 2023

So, got some good news: I hear(*) I managed to reproduce the problem with
current NUT master and an adapted copy of your posted configs and script :D
Experimental debugging now sounds possible.

(*) PC under the desk wails with all its cooling fans as soon as I started
the client which spawned a daemon and itself had exited:

$ UPSNAME=heartbeat at localhost NOTIFYTYPE=ONBATT NUT_STATEPATH=/dev/shm
NUT_CONFPATH=`pwd`/tests/NIT/tmp/etc ./clients/upssched -DDDDDDDD
   0.000000     [D2] parse_at: is 'heartbeat at localhost' in AT command the
'heartbeat at localhost' we were launched to process?
   0.000053     [D1] parse_at: 'heartbeat at localhost' in AT command matched
the 'heartbeat at localhost' UPSNAME we were launched to process
   0.000066     [D1] parse_at: processing CANCEL-TIMER
   0.000089     [D2] parse_at: is 'heartbeat at localhost' in AT command the
'heartbeat at localhost' we were launched to process?
   0.000096     [D1] parse_at: 'heartbeat at localhost' in AT command matched
the 'heartbeat at localhost' UPSNAME we were launched to process
   0.000104     [D1] parse_at: processing START-TIMER

$

Jim

On Tue, Jun 13, 2023 at 1:58 PM Kari Lempiäinen <
kari.lempiainen at summerday.net> wrote:

> Hi,
>
> Thanks Jim! Here is more system information from the commands you
> mentioned.
>
> Kari
>
> root at fricka:~# lsof -p 1716171
> lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1002/gvfs
>       Output information may be incomplete.
> COMMAND      PID USER   FD   TYPE             DEVICE SIZE/OFF     NODE NAME
> upssched 1716171 root  cwd    DIR                8,2     4096        2 /
> upssched 1716171 root  rtd    DIR                8,2     4096        2 /
> upssched 1716171 root  txt    REG                8,2    39240 21762148
> /usr/sbin/upssched
> upssched 1716171 root  mem    REG                8,2  1922136 21764230
> /usr/lib/x86_64-linux-gnu/libc.so.6
> upssched 1716171 root  mem    REG                8,2   210968 21764476
> /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
> upssched 1716171 root    0u   CHR                1,3      0t0        4
> /dev/null
> upssched 1716171 root    1u   CHR                1,3      0t0        4
> /dev/null
> upssched 1716171 root    2u   CHR                1,3      0t0        4
> /dev/null
> upssched 1716171 root    3u  unix 0x00000000eeb52825      0t0 16427010
> type=DGRAM (CONNECTED)
> upssched 1716171 root    4r   REG                8,2      545 39847858
> /etc/nut/upssched.conf
> upssched 1716171 root    5u  unix 0x00000000a035b466      0t0 16426351
> type=STREAM (UNCONNECTED)
> upssched 1716171 root    6u  unix 0x0000000050820b2b      0t0 16426352
> type=STREAM (UNCONNECTED)
> upssched 1716171 root    7u  unix 0x00000000447aac0e      0t0 16424724
> /var/run/nut/upssched.pipe type=STREAM (CONNECTED)
> upssched 1716171 root   10u  unix 0x00000000d7bd8088      0t0 16424722
> /var/run/nut/upssched.pipe type=STREAM (LISTEN)
>
>
> root at fricka:~# ps -ef|grep ups
> root        1425       1  0 Jun11 ?        00:00:00 sshd: /usr/sbin/sshd
> -D [listener] 0 of 10-100 startups
> root     1156722       1  0 00:00 ?        00:00:00 /usr/sbin/cupsd -l
> root     1156723       1  0 00:00 ?        00:00:00 /usr/sbin/cups-browsed
> lp       1156748 1156722  0 00:00 ?        00:00:00
> /usr/lib/cups/notifier/dbus dbus://
> nut      1713117       1  0 14:30 ?        00:00:00 /lib/nut/dummy-ups -a
> heartbeat
> nut      1713154       1  0 14:30 ?        00:00:00 /lib/nut/usbhid-ups -a
> eaton5s
> nut      1713155       1  0 14:30 ?        00:00:00 /lib/nut/upsd -F
> root     1713156       1  0 14:30 ?        00:00:00 /lib/nut/upsmon -F
> root     1713157 1713156  0 14:30 ?        00:00:00 /lib/nut/upsmon -F
> root     1716171       1 99 14:35 ?        00:05:10 /sbin/upssched UPS
> heartbeat at localhost: On battery.
> root     1719510 1550505  0 14:40 pts/2    00:00:00 grep ups
>
>
>
>
> root at fricka:~# fuser /var/run/nut/upssched.pipe
> /run/nut/upssched.pipe: 1716171
>
>
> root at fricka:/proc/1716171/fd# ls -la
> total 0
> dr-x------ 2 root root  0 Jun 13 14:36 .
> dr-xr-xr-x 9 root root  0 Jun 13 14:35 ..
> lrwx------ 1 root root 64 Jun 13 14:36 0 -> /dev/null
> lrwx------ 1 root root 64 Jun 13 14:36 1 -> /dev/null
> lrwx------ 1 root root 64 Jun 13 14:36 10 -> 'socket:[16424722]'
> lrwx------ 1 root root 64 Jun 13 14:36 2 -> /dev/null
> lrwx------ 1 root root 64 Jun 13 14:36 3 -> 'socket:[16427010]'
> lr-x------ 1 root root 64 Jun 13 14:36 4 -> /etc/nut/upssched.conf
> lrwx------ 1 root root 64 Jun 13 14:36 5 -> 'socket:[16426351]'
> lrwx------ 1 root root 64 Jun 13 14:36 6 -> 'socket:[16426352]'
> lrwx------ 1 root root 64 Jun 13 14:36 7 -> 'socket:[16424724]'
>
>
>
> ------------------------------
> *From:* Jim Klimov <jimklimov+nut at gmail.com>
> *Sent:* Tuesday, June 13, 2023 14:17
> *To:* Kari Lempiäinen <kari.lempiainen at summerday.net>
> *Cc:* Arnaud Quette via Nut-upsuser <nut-upsuser at alioth-lists.debian.net>;
> nut-upsdev <nut-upsdev at alioth-lists.debian.net>; Dimitris Economou <
> dimitris.s.economou at gmail.com>
> *Subject:* Re: [Nut-upsuser] Upssched 100% CPU after updating Debian 12
>
> FWIW, cross-posted the issue to NUT GitHub tracker:
> https://github.com/networkupstools/nut/issues/1964
>
> Jim
>
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