Re: JAVA stops spawning

[Thorbjørn Ravn Andersen <thunderaxiom@xxxxxxxxx>]

Chris Wolcott wrote:

> (This is my first JAVA app that runs on an AS/400.)
>
> I have a JAVA app on our AS/400 (JVM 1.4 / OS V5R1) that accepts
> requests from an outside source and spawns a thread to handle each
> request.  (Typically a max of 5, average around 3 at a time.)  Each
> thread creates an AS/400 object and a JDBC Connection object.  The
> command services are disconnected and the connection statements closed
> after each use.  The JDBC Connection is closed at the end of the thread.
> The threads are kept in a home grown thread pool that periodically goes
> through and sets unused threads to null so they can be GC'd.  
>  
Nulling the threads just removes the references but does not stop the 
threads and clean them up.   As long as the run() method runs they are 
still there

My guess is that the old not-terminated threads are still lingering 
around, and you hit some hard limit for the OS/400 JVM.

See 
http://java.sun.com/docs/books/tutorial/essential/threads/lifecycle.html 
under "Stopping a thread" for the proper way to do this.

--
 Thorbjørn