Bug 50164

Summary:	Bind bind-8.2.3-0.6.x problem
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <mal>
Component:	bind	Assignee:	Bernhard Rosenkraenzer <bero>
Status:	CLOSED CURRENTRELEASE	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.2
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2003-08-01 19:06:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2001-07-27 16:16:52 UTC

bind-8.2.3-0.6.x (used as caching DNS) often gets 
to such state that it stops resolving SOME hostnames.

--------------------------------
dig www.clickxchange.com a

; <<>> DiG 8.3 <<>> www.clickxchange.com a 
;; res options: init recurs defnam dnsrch
;; res_nsend to server default -- 192.168.3.1: Connection timed out

Stange thing is that
dig clickxchange.com a
works OK. Only www.clickxchange.com can not be resolved.
Any other host names are OK
dig www.redhat.com a

; <<>> DiG 8.3 <<>> www.redhat.com a 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 3, ADDITIONAL: 3
;; QUERY SECTION:
;;	www.redhat.com, type = A, class = IN

;; ANSWER SECTION:
www.redhat.com.		1D IN A		216.148.218.197
www.redhat.com.		1D IN A		216.148.218.195

-------------------------------
The restart of bind fixes the problem:

dig www.clickxchange.com a

; <<>> DiG 8.3 <<>> www.clickxchange.com a 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2
;; QUERY SECTION:
;;	www.clickxchange.com, type = A, class = IN

;; ANSWER SECTION:
www.clickxchange.com.	1D IN CNAME	clickxchange.com.
clickxchange.com.	1D IN A		216.115.239.51

---------------------------
There is no any bind-related error messages in /var/log/messages

I reported this problem a while ago, in bind 8.1.*
but as you can see from the logs above the problem still exists in Bind
8.2.3

Comment 1 Need Real Name 2001-07-27 16:21:32 UTC

This is a link to that old bug:

http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=10479

Comment 2 Bernhard Rosenkraenzer 2001-07-30 13:22:57 UTC

This looks like the uplink DNS (clickxchange.com) was down, the result "domain 
doesn't exist" got cached, and was looked up from the cache later - in that 
case, it should work again a day later.
Could this be the problem?

Comment 3 Need Real Name 2001-07-30 13:31:57 UTC

I do not think that this was the cause because
dig www.clickxchange.com a
took several seconds to reply.

If it were cached it would reply right away.
For all cached domains the DNS at 192.168.3.1
replies with no any delay.

Comment 4 Need Real Name 2001-07-30 13:34:44 UTC

Also, in the response from dig www.clickxchange.com a
there was a string having "Connection timed out"

;; res_nsend to server default -- 192.168.3.1: Connection timed out

which seems means that caching DNS at 192.168.3.1 did not send a response
in specific time period.