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From Peter Lin <tcw00l...@yahoo.com>
Subject Re: Threads in Tomcat 5
Date Thu, 01 Apr 2004 17:20:39 GMT
 
why do you want to use a thread to manage authentication? given the requestProcessor threads
are reused, it makes no sense to use the thread for the mapping.
 
you're better off just authenticating the first time and setting the HttpSession, rather than
look up the thread. I'm probably missing something.
 
peter


"Angelov, Rossen" <Rossen.Angelov@thomsonmedia.com> wrote:
Hi,

I'm trying to understand how exactly Tomcat 5 is organized to work with
threads. Is there any documentation on how the connector is using the
threads? What happens in the thread pool, how exactly the are threads picked
from the pool and what is their state? And what happens with the released
threads?

Our login application is having problems when retrieving data from the
requests. I was debugging the process by printing out the current thread
name and the request parameter values. 

Everything works fine when there is a different thread assigned to each
request:
request 1
current thread: http8080-Processor25
request 2
current thread: http8080-Processor23
request 3
current thread: http8080-Processor22

When an old thread is used for the new request, things don't work (usually
the wrong parameter values are returned) and the debug output looks like
this:
request 1
current thread: http8080-Processor25
request 2
current thread: http8080-Processor23
request 3
current thread: http8080-Processor25

Our application uses ThreadLocal to create a Hashtable with the current
request parameters as a cache storage. Very often the same thread is used
for more than one requests, the parameter values are retrieved from the
cache instead of using the new values. This completely breaks the logic and
the login process fails.

Thanks,
Ross

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