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From Kumar Pandey <kpandey...@yahoo.com>
Subject Re: Tomcat 5.0.28, Socket hanging on sending 20KB data for 16 minutes
Date Fri, 19 May 2006 17:20:24 GMT
If it was synchronization issue at the code level then
I should have seen the issue during load test in our
env.

We see the issue only for the traffic coming from this
specific network even for just one user in the system.
Cpu is 99% idle.

Also IE just allows 2 socket connection from the
browser at any given time for that instance of IE.I
see upto 30 threads tied up to service one user
session requests for 20KB of data. Each finally clears
up after 16 minutes. Meanhile other users accessing
from other networks (even from India)
does not have this issue. Their request for same data
is getting serviced under sub seconds. by remaining
threads not tied up.

Does anyone have any idea on the re-transmissions of
the same packets from server tcp layer to broswer thus
hanging the connection for upto 16 minutes in Linux
FC4, Tomcat 5.0.28. Who is closing the connection
after  ~16 minutes etc.

Thanks
Kumar

--- Rajeev Jha <jha.rajeev@gmail.com> wrote:

> looking at http://www.jfree.org/jfreechart/javadoc/
> ,
> 
>
org.jfree.chart.encoders.EncoderUtil.writeBufferedImage
> does not look thread-safe.
> try checking
> sun.awt.image.codec.JPEGImageEncoderImpl.encode API.
> 
> Try increasing the latency by re-requesting the
> servlet every 30 secs/ 1 min and see if that works
> fine or not.
> 
> 
> 
> 
> Kumar Pandey wrote:
> 
> 
> 
> >Sorry I forgot to include couple of more stats
> >
> >Tomcat is running on linux FC4
> >Client browser is IE 6.0
> >
> >First line of the dump is
> >"http-0.0.0.0-80-Processor99" daemon prio=1
> >tid=0x8b09b4b8 nid=0x46ec runnable
> >[0x84be7000..0x84be91c0]
> >
> >Thx
> >
> >  
> >
> 
> 
>
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