Auto creating threads in tomcat 4. 1.x

Hi
i have a web application ... inwhich a servlet is waiting for user requests
when tomcat starts up it has 55 threads
lets suppose 200 requests are comming to server if i print only a count say 1,2 or 3
in this case threads remain the same but if i print the request at server side then it creates 30 plus threads after some time
my each request has a string of length 500 charactor
plz let me that where is the problem where it is tomcat problem or some thing in code or the jvm management
thanks in advance

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Creating Threads on Tomcat Deployment

If you want to start a thread in an application server when your application is deployed (such as creating a thread to regularly monitor or analyse data that was submitted to a database, or to open up a port to accept UDP packets) where would you create it?
does anyone know any resources that might point me to the right way to do this?
Thanks,
Jacob
(NB: I am suspect that by default security managers probably don't allow web apps to do things such as create their own ports)

The official way to do this kind of thing is to use a LifecycleListener, which is a class implementiing the LifecycleLisetener whose FQN you supply in the server.xml config file. You can put these listeners in at various levels of the container, at the server or individual web-app level.
In fact, by default, Tomcat runs without a security manager - the default assumption is that you wrote the web-app code yourself and, hence, trust it.
If you need to run with a security manager then you are going to have to tweak the policy file a fair bit anyway, to get all you database and file access working. I had to do this, once, to enable RMI calls from servlets.
(As I recall the policy file is in the tomcat configuration directory).
ps.
Don't forget if you start a thread inside Tomcat you need to think about how it will terminate. If you don't make set it to daemon mode, or close it explicitly from a life cycle listener it may prevent Tomcat from being closed down cleanly.
Message was edited by:
malcolmmc

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Listeners, load a class on startup and creating threads in infinite loop

This is an identical post to the one I made in the jsp forum. I do this as I know, being a regular here, that there are equally good people(in j2ee web application development) in both these forum, but many of them stick to their particular forums of choice - jsp / servlets.
I was wondering if there is any means by which I could launch my own class when tomcat starts (in the same jvm).
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5. I have rejected #2 and settled on either #3 or #4 - the ServletContextListener or Tomcat specific Lifecycle Listener, though the later, as I said binds me to Tomcat (which is ok for me). Are there any other specific (dis)advantages of using either especially when I have to create threads from within them (on context startup)? Other than memory leaks, killing the thread objects & associated resources on context shutdown, is there anything else that I need to watch out for while using threads.
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Anybody ? Sorry for bumping up.
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Hi,
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PO CNV: Auto-Create POs from PUR Reqs generated by OM

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Sap Gurus
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Requisition Distribution DFF Values Not Copied To Purchade Order Distribution DFF During Autocreate (Doc ID 976943.1)
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Auto creating threads in tomcat 4. 1.x

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