192579 - DNS: failure halts DNS resolution during failure

Status: VERIFIED DUPLICATE of bug 70213

(Core :: Networking, defect)

Description

[Kelly Price]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021130

DNS resolution likes to halt other resolution of other domains beyond the
existing DNS cache, especially while at least one DNS resolution request is
failing.  For example, if http://www.newshounds.com is down because the DNS
isn't working, http://www.gamingguardians.com will not even attempt to load
until the DNS failure is cleared.

Reproducible: Always

Steps to Reproduce:
1.  Open a known non-resolving domain in one window or tab.
2.  Switch to another window and try opening a non-cached domain that does resolve
3.  Wait for complaint.
4.  See the non-cached domain load, finally.

Actual Results:  
Non-cached domain loads after the complaint.

Expected Results:  
Non-cached domain should load durring the non-resolving domain's DNS Failure.

Comment 1

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 70213 ***

Comment 2

[benc]

This is caused in part, because after we cannot find the initial hostname, we
call resolver in a way that it continues to use the search domains to complete
the string as a PQDN.

Fixing bug 124565 would reduce the length of the failing request