1.0.20 / DNS_ERR_FAIL (on heavy load ?)

Hi all,

I'm using Squid 1.0.20 / Linux 2.0.25 / P5-100 / 64 MB RAM.
It worked perfectly for 2 month. Then a strange thing happened last night. Checking the access.log file, I found LOTs of ERR_DNS_FAIL entries (following are some samples):
850327005.205 339 194.126.34.87 ERR_DNS_FAIL/400/NONE 916 GET http://www.oman-net.com/ips/mai
n.htm
850327014.070 150 194.126.34.87 ERR_DNS_FAIL/400/NONE 893 GET http://www.pna.org/mininfo/
850327016.904 181 194.126.34.112 ERR_DNS_FAIL/400/NONE 936 GET http://search.yahoo.co.uk/sear
ch/ukie/options
850327028.655 289 192.168.1.100 ERR_DNS_FAIL/400/NONE 886 GET http://www.faxsav.com/
850327031.364 468 194.126.34.80 ERR_DNS_FAIL/400/NONE 933 GET http://monopoly.cs.umn.edu/~tor
go/geek.html
850327032.599 189 194.126.34.87 ERR_DNS_FAIL/400/NONE 927 GET http://www.iap.org/politics/pea
ce/peace.html
850327038.398 198 194.126.34.84 ERR_DNS_FAIL/400/NONE 930 GET http://www.lek.no/members/cockt
ail/tilbake.jpg
850327041.845 35 192.168.1.2 ERR_DNS_FAIL/400/NONE 915 GET http://sirio.cineca.it/proxy/sear
ch/
850327042.371 63 194.126.34.87 ERR_DNS_FAIL/400/NONE 927 GET http://www.iap.org/politics/pea
ce/peace.html
850327043.336 130 194.126.34.112 ERR_DNS_FAIL/400/NONE 926 GET http://search.yahoo.co.uk/sear
ch/ukie?p=
850327047.534 116 194.126.34.87 ERR_DNS_FAIL/400/NONE 893 GET http://www.pna.org/mininfo/
850327057.419 37 192.168.1.2 ERR_DNS_FAIL/400/NONE 915 GET http://sirio.cineca.it/proxy/sear
ch/

I have "dns_children 6" in squid.conf, and the cache manager reports that the fifth was never used! (which means this is not a DNS blocking issue). The funny thing is that nslookup was able to resolve these names at the command line! The domains do exist!

$ nslookup www.faxsav.com
Server: moon.cyberia.net.lb
Address: 194.126.34.34

Name: nys1.faxsav.com
Address: 204.91.139.65
Aliases: www.faxsav.com

Any ideas?

Thanx.

-----------------------------------------------------------
Samer Bohsali | Tel: 961-1-744101
Network Manager | Fax: 961-1-744102
Cyberia s.a.l | E-mail: sbohsali@cyberia.net.lb
http://www.cyberia.net.lb/|
-----------------------------------------------------------
Received on Thu Dec 12 1996 - 00:13:54 MST