483544 - entire application not responding (hanging) when DNS unreachable

Status: RESOLVED DUPLICATE of bug 235853

(Firefox :: General, defect)

Description

[Chris Kistner]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.7) Gecko/2009021910 Firefox/3.0.7
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.7) Gecko/2009021910 Firefox/3.0.7

Firefox (not just the current tab) will freeze completely every time until it either receives a DNS response or until the DNS response times out, which is very frustrating on a network where the connection to the DNS server is not so stable.

Reproducible: Always

Steps to Reproduce:
1. Prevent access to & from the DNS server for lsass.exe (in Windows)
2. Try load any page where a DNS query would've been done: ie. www.google.com
Actual Results:  
The entire Firefox application is not responding (freezing) when it's unable to get a DNS response.

Expected Results:  
An indication in the status bar that the tab is waiting on a DNS response and the application should respond normally

Comment 1

[Chris Kistner]

This case is related to https://bugzilla.mozilla.org/show_bug.cgi?id=235853

Comment 2

[Wayne Mery (:wsmwk)]

Chris, are you using PAC?  You don't consider this to be a duplicate of bug 235853?

Comment 3

[Chris Kistner]

Wayne, yes I am in fact using a PAC file and the issue didn't occur when I set a manual proxy. The issue occurs even if I refer to a PAC file hosted on my C:\ drive.