77702 - Pages show twice like starting new (double reload of pages)

Status: VERIFIED DUPLICATE of bug 61363

(Core :: Networking: HTTP, defect, P3)

Description

[Stefan Seifert]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.8.1+) Gecko/20010425
BuildID:    2001042520

Sometimes pages show twice. It loads, starts showing and suddenly shortly after
starting the progress bar steps back to nearly start and the view starts
building again. It's like the page is loaded twice and the second shortly after
the first overwriting it.

I've seen this on cgi generated pages like Bugzilla and some in my project.
Maybe this bug occures on static html pages too. But I'm not able to reproduce
it every time, seems like it occures on pages that need long to load and display.

Reproducible: Sometimes
Steps to Reproduce:
1. go to a page (like Bugzilla show bug)
2. watch loading the page and the progressbar

Actual Results:  pages starts loading again.

Expected Results:  page should simply show.

Comment 1

[Chris Petersen]

Reporter, I 'm not able to reproduce with the May 8th build. Can you try with a 
newer build ?

Comment 2

[Stefan Seifert]

I have just seen it yesterday with a May 9 Build.

I'm pretty sure that it loads the page twice. I wanted to write a comment in 
Bugzilla when the page wasn't fully loaded yet. Suddenly form elements where 
deleted and the page started loading again.

I see this sometimes, in cgi generated pages wich take long to transfer.

Comment 3

[Keyser Sose]

Marking NEW.

Comment 4

[Hixie (not reading bugmail)]

I see this with various pages, including http://www.mysql.com/doc/ -- going to
that URI causes the page to suddenly reload when it's nearly done. Very 
annoying. I'm guessing this is Networking related, so ->Networking. (It's almost
certainly not "Views" related, that's for sure.)

I was on Windows 2000 using the Netscape Commercial build 2001053004.

Comment 5

[Kevin McCluskey (gone)]

Reassigning to Networking

Comment 6

[neeti]

This worksforme. Reporter: please try this with the latest builds.

Comment 7

[Doug Turner (:dougt)]

wfm linux today's build.  reporter plz reopen if this still persists with a
current build.

Comment 8

[Stefan Seifert]

I reopen this bug even if I wasn't able to reproduce this bug but for 2 reasons:

1. Since this bug was closed I have a faster connection. I think this bug
depends on some sort of timeout so this may be a reason why I'm not able to
reproduce. It was hard to do this even when I had a slower connection.

2. I saw today a comment in Mozillazine Forum where a bug exactly like this was
described, that some pages start loading a second time when they are nearly
finished.

Again, I have to say, that this bug is difficult to reproduce!

Comment 9

[michel]

When this bug occurs, clicking on link on the "first" occurence of the page 
brings to the link on the "second" occurence of the page. Then clicking on the 
second link works.
It is a relatively random bug, so most of the times reloading the page fixes it.

Comment 10

[http://tinymailto.com/oliversl]

Try deleting this line form your prefs.js file:
user_pref("intl.charset.detector", "zh_parallel_state_machine");

Comment 11

[http://tinymailto.com/oliversl]

another to solve this bug is by selecting the menu:
View->Character Coding->Auto-Detect->(Off)

Comment 12

[Doug Turner (:dougt)]

moving neeti's futured bugs for triaging.

Comment 13

[benc]

-> http

Comment 14

[Boris 'pi' Piwinger]

WFM. I have never seen this using Linux or Windows 98, the latter also at a 56k
modem connection.

pi

Comment 15

[http://tinymailto.com/oliversl]

I can reproduce it always in Mozilla 1.2a on WinXP using a 31kbps conection
Also, please note this:
1. start mozilla with a new profile
2. Select View->Character Coding->Auto-Detect->Chinese
3. close Mozilla and QuickLaunch
4. delete the contents of your Cache folder
5. start Mozilla for testing:
   5.1 go to gamespot.com, click on "News" on the very top of the page
   5.2 click on "PC" to select PC news
   5.3 the page load twice.

Comment 16

[Brant Gurganus]

cc'ing internationalization people since the character set detector seems to be
involved

Comment 17

[Simon Montagu :smontagu]

There already is a bug on character set detection causing double loads.

Comment 18

[farcusnz]

I see this bug consistently on WinXP and have seen it in all builds I have used
from 0.98 through to 1.4
I never thought about tracing it back to Autodetect / Japanese but looking at an
earlier reprot it looks like it could be related to characer coding auto detect.
I'll try turning off auto detect and see what happens.

Comment 19

[Simon Montagu :smontagu]

*** This bug has been marked as a duplicate of 61363 ***

Comment 20

[benc]

V/dupe.

I don't think this happens anymore, but the linked bug is still open. It
describes <meta> as another cause, so maybe it is partially fixed (or that bug
morphed).