Sporadic Timeouts after upgrading to bind9.20

[Klaus Darilion]

From: Ondřej Surý <ondrej at isc.org>
Sent: Friday, September 6, 2024 4:08 PM
To: Klaus Darilion <klaus.darilion at nic.at>
Cc: Petr Špaček <pspacek at isc.org>; bind-users at lists.isc.org; Klaus Darilion via bind-users <bind-users at lists.isc.org>
Subject: Re: Sporadic Timeouts after upgrading to bind9.20

Are your running with options { reuseport no; };  ?

You might want to try that.

After setting reuseport no; (and UV_THREADPOOL_SIZE=12) I have not seen any timeouts anymore.

Anyway, this:

TID 8917:
#0  0x00007b385aa6daa9     cds_lfht_destroy - /usr/lib/x86_64-linux-gnu/liburcu-cds.so.8.1.0

caught my eye. Are the zones you are hosting particularly large on GLUE?

I don’T know and I have not checked yet. One of the affected zones is .ch.  You could download the zone from https://zonedata.switch.ch/ And they are using NSEC (not NSEC3 as I have written before)



Also if you have more eu-stack, can you confirm this is the pattern now?

After setting reuseport no; I do not have stack-traces any more. But if that would help you I can undo the workaround next week to collect traces.

Thanks
Klaus


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