164593 - DNS: stopping/reloading causes DNS failures?

Status: RESOLVED WORKSFORME

(Core :: Networking, defect)

Description

[frank]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1b) Gecko/20020722
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1b) Gecko/2002072204

I have had this problem with all versions of netscape and mozilla. I can
duplicate this problem jusr about every time. The version of bind I am using
is 9.1.0. I also had this problem with previous versions of bind. Here is the
problem. When mozilla queries named and I stop mozilla during the query. It can 
then no longer find any url's. It seems to loose touch with the dns. I then
restart mozilla and all is well again. Also it looses touch sometimes with the
dns if it can not find a url. 
I tried doing a search of a url after mozilla shows the problem to make sure
it was not bind. mozilla cannot find the url but the query of named does find
the url, so I concluded it was not a bind problem. 

Reproducible: Always

Steps to Reproduce:
1. Stop mozilla during it's query of the dns.
2. Do a reload of the page or go to another url
3. mozilla can no longer find any url's

Actual Results:  
I now have to restart mozilla and all is well.

Expected Results:  
It should not be getting stuck on dns queries.

You can contact me for additional information, but I don't know what else I
can say.

Comment 1

[Mitch]

I's get a tcpdump of your net for port domain (dns) to se if there
is further traffic from the browser to your nameserver. This will
tell us where the process is "hung" - i.e. in the browser (it's not
actually sending out any more name queries), or your named is not
infact responding to mozilla queries (perhaps you can put named in
debugging mode)

Second to that, you can "gdb /somewhere/mozilla-bin process_id" and
then do a "bt" to see if one of the mozilla process is hung up.
I believe mozilla now uses one process as a asynchronous dns resolver.

Comment 2

[Rob North]

I think I'm seeing the same thing:
I don't run a local name server.
If I attapt to browse to a page, while ADSL modem/router is off,(or if through
dailup when PPP is disabled) then the page I browse to fails to load.
All further pages fail to load regardless of wether connected to the internet or
not.
I also can restore browsing by closing & restarting Mozilla.

I might expect failure while I'm offline, but I wouldn't expect failure
when restore connection.

Will try the tcpdump test soon.

Comment 3

[Rob North]

I have just confirmed that my problem isn't this bug.
Sorry.

Comment 4

[hirata masakazu]

May be related to bug 117613, and bug 151683.

Comment 5

[benc]

I think this is related to something Darin wanted me to verify, but I can't find
it...

Comment 6

[gordon]

*** Bug 164988 has been marked as a duplicate of this bug. ***

Comment 7

[gordon]

I'll take this.

Comment 8

[benc]

-> defaults.