Servlet Concurrency Issues

[Michael Pasko <mp...@TICOSTAT.COM>]

I've recently developed a servlet that connects to an AS/400, and returns
results off an sql query based off criteria submitted by a form.  I've had
pretty much exclusive use of the Tomcat server during development, but when
I started allowing other users on it, I stumbled on some problems.
Basically what happens, when user A submits the form, and then 2 seconds
later user B submits the same form.  User A stops getting results, and User
B receives the output for his request as well as the end of User A's
request.  User A is on a different computer than B and both have different
session ID's.  I'm sure this is a configuration error on my part, but would
appreciate a direction on where to look.
 
PS - I create a session if it doesn't exist, and store the username and DB
connection in it.  (Will use JNDI later) 
 
 
 
 
I'm using Tomcat 5.5.7

RE: Servlet Concurrency Issues

[George Sexton <gs...@mhsoftware.com>]

You're probably using instance properties on the servlet object. 

George Sexton
MH Software, Inc.
http://www.mhsoftware.com/
Voice: 303 438 9585
  

> -----Original Message-----
> From: Michael Pasko [mailto:mpasko@TICOSTAT.COM] 
> Sent: Tuesday, June 07, 2005 12:09 PM
> To: 'tomcat-user@jakarta.apache.org'
> Subject: Servlet Concurrency Issues
> 
> I've recently developed a servlet that connects to an AS/400, 
> and returns
> results off an sql query based off criteria submitted by a 
> form.  I've had
> pretty much exclusive use of the Tomcat server during 
> development, but when
> I started allowing other users on it, I stumbled on some problems.
> Basically what happens, when user A submits the form, and 
> then 2 seconds
> later user B submits the same form.  User A stops getting 
> results, and User
> B receives the output for his request as well as the end of User A's
> request.  User A is on a different computer than B and both 
> have different
> session ID's.  I'm sure this is a configuration error on my 
> part, but would
> appreciate a direction on where to look.
>  
> PS - I create a session if it doesn't exist, and store the 
> username and DB
> connection in it.  (Will use JNDI later) 
>  
>  
>  
>  
> I'm using Tomcat 5.5.7
> 


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