web server return Error 404 not found but file exist

Hi.

The browser sends same request but web server returns 404 error sometimes.

Why this error happens regardless of file exist.

There is no errorlog for the file.

* accesslog

150.20.114.232 - - [03/May/2007:09:44:29 +0900] "GET /dtvPlatform/css/skt/platform/seclinux/common/style.css HTTP/1.1" 200 10162

150.20.114.232 - - [03/May/2007:09:44:30 +0900] "GET /dtvPlatform/css/skt/platform/seclinux/common/style.css HTTP/1.1" 200 10162

150.20.114.232 - - [03/May/2007:09:44:31 +0900] "GET /dtvPlatform/css/skt/platform/seclinux/common/style.css HTTP/1.1" 404 1214

150.20.114.232 - - [03/May/2007:09:49:21 +0900] "GET /dtvPlatform/css/skt/platform/seclinux/common/style.css HTTP/1.1" 200 10162

[744 byte] By [energeiaa] at [2007-11-27 3:17:55]
# 1
Which version of the server are you using?Do you have any Java web applications deployed or plugins installed?
elvinga at 2007-7-12 8:20:32 > top of Java-index,Web & Directory Servers,Web Servers...
# 2
I use Sun ONE Web Server 6.1.And I have no Java web applicatin and plugin.
energeiaa at 2007-7-12 8:20:32 > top of Java-index,Web & Directory Servers,Web Servers...
# 3
...which service pack? If you're not using 6.1SP7, I recommend you try that.
elvinga at 2007-7-12 8:20:32 > top of Java-index,Web & Directory Servers,Web Servers...
# 4
Do you have a reason that you suggest the web server update? Web server bug fixed in service pack 7 etc..Anyway I don't administer web server, so I don't know which service pack used.I'll ask administrator and try that.Thanks for advice.
energeiaa at 2007-7-12 8:20:32 > top of Java-index,Web & Directory Servers,Web Servers...
# 5
Service packs exist only to fix bugs. Sun ONE Web Server 6.1 was released almost 4 years ago, so lots of bugs have been found and fixed since then. I don't know whether this particular problem is among them.
elvinga at 2007-7-12 8:20:32 > top of Java-index,Web & Directory Servers,Web Servers...