[mapserver-users] Mapscript/Java/Servlet users: give this a whirl...

[C F]

I've been having this very unusual problem running servlets and mapscript.  
As far as I can tell, it's working great except under one condition.  If a 
user submits a request to the servlet, then hits the browser's refresh 
button before the his/her previous one is finished, it *crashes* my servlet 
engine.  This only happens if I'm executing imageObj.draw() somewhere in it 
*and* trying to print a response back to the client.  If I don't do anything 
with my HTTPServletResponse object, I can hit refresh as many times as I 
want as fast as I want with no problems.  Anyway, without getting too deep 
into the issue, etc. I would be grateful if someone else could try doing 
this.

Submit a request to your servlet that draws a map and saves out to an image 
(one that takes at few seconds or more).
Then hold your <CTRL> key down (to make sure it refreshes) and hit your 
refresh button a few times fast while your first request is still pending.
Sometimes it'll keep showing you the cached page after the servlet engine 
has crashed.  So after that, try moving to another page being served by your 
servlet engine, or change your url params or just somehow check to make sure 
it actually *is* running.

I'd like to hear your results.

Here's my environment.....
Linux 7.3
Tomcat 4 (standalone)
JDK 1.4 (J2SDK)
--------------
MapServer version 3.6.0 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP SUPPORTS=PROJ 
SUPPORTS=TTF SUPPORTS=WMS_SERVER INPUT=TIFF INPUT=EPPL7 INPUT=JPEG 
INPUT=POSTGIS INPUT=SHAPEFILE
---------------
My data is all in PostGIS


Another note... I also tried this with Tomcat 3 and JDK 1.3... same results.
Also note that this problem *only* occurs with concurrent requests from the 
*same* browser.  I can hit it at the same time with several different 
browsers with no problems.

Thank you

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