[tor-relays] Tor not starting but log inconclusive

[yl <tor@xxxxx>]

Hello all,
I have a problem with a Tor Exit.

Tor will not start correctly, but there is nothing in the logs. Here is 
the info I got.


tor --version
Tor version 0.4.6.8.
Tor is running on Linux with Libevent 2.1.8-stable, OpenSSL 1.1.1d, Zlib 
1.2.11, Liblzma 5.2.4, Libzstd 1.3.8 and Glibc 2.28 as libc.
Tor compiled with GCC version 8.3.0



journalctl -u tor --since="14 hours ago"
-- Logs begin at Tue 2021-12-14 04:28:56 CET, end at Tue 2021-12-14 
10:19:59 CET. --
Dec 14 04:28:59 tor.piratenpartei-nrw.de systemd[1]: Starting 
Anonymizing overlay network for TCP (multi-instance-master)...
Dec 14 04:28:59 tor.piratenpartei-nrw.de systemd[1]: Started Anonymizing 
overlay network for TCP (multi-instance-master).
Dec 14 10:12:00 tor.piratenpartei-nrw.de systemd[1]: tor.service: Succeeded.
Dec 14 10:12:00 tor.piratenpartei-nrw.de systemd[1]: Stopped Anonymizing 
overlay network for TCP (multi-instance-master).
Dec 14 10:12:00 tor.piratenpartei-nrw.de systemd[1]: Stopping 
Anonymizing overlay network for TCP (multi-instance-master)...
Dec 14 10:12:00 tor.piratenpartei-nrw.de systemd[1]: Starting 
Anonymizing overlay network for TCP (multi-instance-master)...
Dec 14 10:12:00 tor.piratenpartei-nrw.de systemd[1]: Started Anonymizing 
overlay network for TCP (multi-instance-master).


In the tor log I have:
Dec 14 00:22:25.000 [notice] General overload -> DNS timeouts (162) 
fraction 1.0484% is above threshold of 1.0000%
Dec 14 00:32:25.000 [notice] General overload -> DNS timeouts (154) 
fraction 1.0664% is above threshold of 1.0000%
Dec 14 00:42:25.000 [notice] General overload -> DNS timeouts (140) 
fraction 1.0721% is above threshold of 1.0000%
Dec 14 01:32:57.000 [notice] Interrupt: we have stopped accepting new 
connections, and will shut down in 30 seconds. Interrupt again to exit now.
Dec 14 01:32:58.000 [notice] Delaying directory fetches: We are 
hibernating or shutting down.
Dec 14 01:33:27.000 [notice] Clean shutdown finished. Exiting.
Dec 14 10:12:01.000 [notice] Tor 0.4.6.8 opening log file.
Dec 14 10:12:01.103 [notice] We compiled with OpenSSL 1010104f: OpenSSL 
1.1.1d  10 Sep 2019 and we are running with OpenSSL 1010104f: 1.1.1d. 
These two versions should be binary compatible.
Dec 14 10:12:01.104 [notice] Tor 0.4.6.8 running on Linux with Libevent 
2.1.8-stable, OpenSSL 1.1.1d, Zlib 1.2.11, Liblzma 5.2.4, Libzstd 1.3.8 
and Glibc 2.28 as libc.
Dec 14 10:12:01.104 [notice] Tor can't help you if you use it wrong! 
Learn how to be safe at https://www.torproject.org/download/download#warning


You can see the start was at 04:28:59 but it only started when I did 
"systemctl restart tor" at 10:12:01.103.

I have this issue for some weeks, maybe since the late summer. I do not 
restart the Exit that often, so just 3 restarts due to some updates of 
Debian.

Any idea how to troubleshoot this and what to look for?

Thanks
yl
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