tomcat-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From bugzi...@apache.org
Subject DO NOT REPLY [Bug 43002] - NIO connector performance issue in 6.0.13
Date Fri, 09 Nov 2007 23:21:07 GMT
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG·
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=43002>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND·
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=43002


guy.molinari@dig.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WORKSFORME                  |




------- Additional Comments From guy.molinari@dig.com  2007-11-09 15:21 -------
Some new information on this issue, so I reopened it.  

The problem seems to relate to parsing the body content when the **Transfer-
Encoding: chunked** header is present.  It appears that the chunk length gets
corrupted under load and the client is unable to parse the chunk out of the 
response body.

When the NIO connector parameter **socket.appWriteBufSize** is set to a value 
larger than the total response body, the error condition does not occur.

One might succesfully argue that this is proper performance tuning.  The Tomcat 
documents point out that to scale a large number of long held connections, the 
buffer sizes may need to be less than the response body (the memory footprint 
would be quite large otherwise).

Could there be a race condition involving the response buffering code?  

I have confirmed this behavior on both JDKs 1.5 and 1.6 on both Windows 2003 
and Linux.




-- 
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
For additional commands, e-mail: dev-help@tomcat.apache.org


Mime
View raw message