Periodically loses DNS settings. Cannot resolve "localhost" and cannot exit without a kill



14 years ago
10 years ago


(Reporter: brad, Unassigned)



Firefox Tracking Flags

(Not tracked)




14 years ago
User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040514
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040514

The mail client periodically loses its DNS settings after operating fine up to
that point. It typically gives an error on send. It comes up with "cannot
resolve localhost". Attempting to get new messages comes up with a similar error
for resolving the mail server.

I have a single POP3 acct and several IMAP accts configured. The connection is
via a reliable LAN. There are no networking problems and certainly no DNS
problems or routing problems in the environment. This is definitely internal to

The browser also cannot resolve URLs when this bug occurs.

Mozilla will also not close down the mail client as it can no longer disconnect
from the mail server.

The only way to exit mozilla is to KILL -HUP the mozilla process. It then exits
smoothly and works fine on startup again.

Reproducible: Sometimes
Steps to Reproduce:
1. Open mail
2. Use mail to send/receive for a while. This can be as much as 1/2 day

Actual Results:  
System can no longer resolve DNS.

Expected Results:  
Continued to resolve DNS

No crash, core dumps or any error message other that the popup saying that it
cannot resolve the URL (in browser) or mail server (in mail client).

Comment 1

14 years ago
Do you have any antivirus running on your system?
I'm terribly sorry, I can't recall the bug number, but I'm sure there's an AV
that changes the  server settings of several mail clients to "localhost".

Comment 2

14 years ago
No antivirus running, no. It's a linux box so thankfully not subject to the
onslaught that windows users have!

The system loses DNS in the browser as well. All of mozilla fails to resolve
when this kicks in although invariably it happens after I have been using mail
(then again, I use mail many times more than I browse so this may be misleading).

I wish that I could provide an accurate means of reproducing this problem. I am
attempting to, but so far it just seems "random" which from a software
correction point of view isn't what we want!

Comment 3

14 years ago
Something else that may help: This problem only started when I upgraded to the
latest version of Mozilla. It wasn't there before.
Product: MailNews → Core
This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

The latest beta releases can be obtained from:

Comment 5

13 years ago
Firefox does not suffer from this problem, only Thunderbird. All the latest
versions of Thunderbird has this problem too.

Comment 6

13 years ago
I think that probably why no-one else has confirmed this is that I use the thing
a lot on the move through 3G wireless which drops off and then reconnects... it
keeps everything alive and firefox, ssh, all the rest works... but thunderbird
just never refreshes DNS.

I am now convinced that this is a DNS refresh problem in thunderbird.
sorry for the spam.  making bugzilla reflect reality as I'm not working on these bugs.  filter on FOOBARCHEESE to remove these in bulk.
Assignee: sspitzer → nobody

Comment 8

11 years ago
WFM per reporter "Thunderbird (X11/20070728)"
Last Resolved: 11 years ago
Resolution: --- → WORKSFORME


10 years ago
Product: Core → MailNews Core
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