Last modified: 2007-02-20 05:08:04 UTC

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Bug 8949 - IE6 freezes for one minute on a first hit for yaseo server
IE6 freezes for one minute on a first hit for yaseo server
Status: RESOLVED FIXED
Product: Wikimedia
Classification: Unclassified
DNS (Other open bugs)
unspecified
PC Windows XP
: Highest critical (vote)
: ---
Assigned To: Nobody - You can work on this!
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2007-02-11 17:26 UTC by Makoto Imaizumi [Suisui]
Modified: 2007-02-20 05:08 UTC (History)
0 users

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Attachments
tcp dump - faild - all (411.36 KB, application/octet-stream)
2007-02-11 17:38 UTC, Makoto Imaizumi [Suisui]
Details
tcpdump success (152.48 KB, application/octet-stream)
2007-02-11 17:45 UTC, Makoto Imaizumi [Suisui]
Details

Description Makoto Imaizumi [Suisui] 2007-02-11 17:26:01 UTC
From about a week ago, yaseo has problem.

It occurs any version of windows IE6 or under.
to reproduce, it's simple.

1. clear all the cache of IE
2. access to http://ja.wikipedia.org/ (not other project) with IE

that will freez all IE windows for a minute.
while freez, nothing shown on window where request ja.wikipedia.org but <title>
is shown correctly (as メインページ).
after that, IE will show mainpage corrctly. nothing lacks.
this mean, everyone came to wikipedia first time (with IE) must wait for a minute.
 
Many non-wikipedian came from yahoo, google suffers that and complains about it
around ja.

It only occurs when access from asia area,
I mean, hosts index is like
211.115.107.162  ja.wikipedia.org
211.115.107.163  upload.wikimedia.org

and it's because IE's keepalive bug.
There's several known ways to escape it
# setting keepalive time to 0 with some application or editing registory
# using http proxies
# setting etc/hosts as
66.230.200.100 upload.wikimedia.org
# disable css on IE option
# use any other browser including IE7

but, you know, we cant say anything for first visiter or non-wikimedian from
everywhere, so those information to escape DONT works.

it's not occur any other projects.
it's occur only from around yaseo (I alredy tried to reproduce from EU area with
setting hosts file with an admin, but it doesnt)

there's list of what we know
* IE's default keepalive time is 1 minute.
* changing keepalive time to 0 will escape this problem
* IE's keep alive has bug and fixed in IE7
* it's not occurs on any other browser.
and damn.

I'll attach 3 tcpdump results
Comment 1 Makoto Imaizumi [Suisui] 2007-02-11 17:38:27 UTC
Created attachment 3208 [details]
tcp dump - faild - all

this is a zipped dump with windump (tcpdump on windows)
with 
>windump -l -s 1600 -X -i 3 (port HTTP) and ((host 211.115.107.162) or (host
211.115.107.163))
and access to ja.wikipedia.org with IE.

ref:
211.115.107.162 rr.yaseo.wikimedia.org (ja.wikipedia.org)
211.115.107.163 vip2.yaseo.wikimedia.org (upload.wikimedia.org)

LEONALD is my host.

see, a timestamp of 
00:28:14.563767 and next ack (00:29:12.601284)
it is a GET request of Wiki.png and ack, it costs 1 minutes.
Comment 2 Makoto Imaizumi [Suisui] 2007-02-11 17:45:53 UTC
Created attachment 3209 [details]
tcpdump success

this is a zipped dump of windump with

>windump -l -s 1600 -X -i 3 (port HTTP) and ((host 66.230.200.100) or (host
211.115.107.163))

and add a line to etc/hosts as
66.230.200.100 upload.wikimedia.org

this shows wikipedia correctly in 2 sec.

those two dumps take with same PC, same OS, same Browser, same settings except
hosts file.

I know it occurs from IE's bug, but 2weeks ago it's not occured so it's a
wikitech issue.
please fix it up! thanx.

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