On 4/12/23 10:47, andre.bolinhas@xxxxxxxxxxxxxx wrote:
yes the same happens with squid 5.8
on dmesg sometimes I also get this kernel panic
https://drive.google.com/file/d/1M3bzCASNGITuiTOKykIFhvGS6TvnHoKM/view?usp=sharing
That image appears to show a Squid process segmentation fault. If that
is the case, and Squid v5 is involved, then I recommend getting a
backtrace from that fault. Most Squid segmentation faults are Squid
misconfigurations and/or bugs.
However, that is just a general recommendation. Without knowing more
about your seemingly unusual environment (see my original questions in
the email below), it is difficult for me to guide you towards a solution.
Alex.
-----Mensagem original-----
De: squid-users <squid-users-bounces@xxxxxxxxxxxxxxxxxxxxx> Em Nome De
Alex Rousskov
Enviada: 11 de abril de 2023 01:22
Para: squid-users@xxxxxxxxxxxxxxxxxxxxx
Assunto: Re: idnsSendQuery: Can't send query, no DNS socket!
On 4/10/23 17:14, andre.bolinhas@xxxxxxxxxxxxxx wrote:
We have experienced some issue on our squid servers, time to times the
listen port fails and users are unable to connected to the proxy.
We already try use squid 4.17 and squid 5.8 but had the same issue on
both version, you can find I GDrive the extract of the cache.log on
the time of the failure.
2023/04/10 16:25:54 kid2| Starting Squid Cache version 4.17 for
x86_64-pc-linux-gnu...
2023/04/10 16:26:00 kid2| Shutting down...
2023/04/10 16:26:00 kid2| Squid Cache (Version 4.17): Exiting normally.
2023/04/10 16:26:03 kid2| Starting Squid Cache version 4.17 for
x86_64-pc-linux-gnu...
2023/04/10 16:26:15 kid2| Shutting down...
2023/04/10 16:26:15 kid2| Squid Cache (Version 4.17): Exiting normally.
2023/04/10 16:26:18 kid2| Starting Squid Cache version 4.17 for
x86_64-pc-linux-gnu...
Are you starting and shutting down your Squids at a very high frequency?
FWIW, older Squids, possibly including Squid v4, are not very good at
handling this kind of exercise.
2023/04/10 16:23:19 kid2| Preparing for shutdown after 221344 requests
2023/04/10 16:23:19 kid2| Preparing for shutdown after 221344 requests
2023/04/10 16:23:19 kid2| Preparing for shutdown after 221344 requests
2023/04/10 16:23:19 kid2| Preparing for shutdown after 221344 requests
2023/04/10 16:23:19 kid2| Preparing for shutdown after 221344 requests
This Squid appears to be seriously confused, stuck in some kind of a
shutdown loop. Do you see similar repeated same-kid same-request-count
"Preparing for shutdown" messages with Squid v5+?
On the cache log I see to many
idnsSendQuery: Can't send query, no DNS socket!
IIRC, at a certain shutdown stage, Squid closes DNS sockets. That
prevents Squid from sending DNS queries. I do not know if that shutdown
aspect has improved since v4. However, I would be a lot more worried
about frequent restarts and shutdown loops(?) at this point. Something
unusual and probably bad is going on...
HTH,
Alex.
And
2023/04/10 16:25:59 kid4| Waiting 10 seconds for active connections to
finish
2023/04/10 16:25:59 kid4| Preparing for shutdown after 763 requests
This is the dns configuration squid/dns.conf
# Return DNS used by the system (means resolv.conf)
client_dst_passthru off
host_verify_strict off
ignore_unknown_nameservers off
dns_retransmit_interval 3 seconds
dns_v4_first on
ipcache_size 16384
ipcache_low 90
ipcache_high 95
fqdncache_size 1024
positive_dns_ttl 6 hours
negative_dns_ttl 300 seconds
Resolv.conf
domain xyz.my
search xyz.my
options attempts:2 timeout:2
nameserver 127.0.0.1
nameserver 8.8.8.8
nameserver 1.1.1.1
127.0.0.1 is the unbound internal DNS.
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