If you are spawning threads from your servlet, make sure that they are cleaned up when the servlet is destroyed. Otherwise, you will have a thread leak. I have ran into this problem when the webapp is reloaded without restarting the server. Each leaked thread has a reference to its classloader, preventing that classloader from being garbage collected. Reload enough time will run the perm space out of memory.
Bill On 1/29/07, Christopher Schultz <[EMAIL PROTECTED]> wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Danny, David Delbecq wrote: > 1) Your servlet must always take care to finish all Threads it has > spawned. This mean when servlet gets unloaded, you must have provided a > mecanism in your servlet to stop all running threads your servlet has > created. Remaining Threads not handled by container can either cause > tomcat to not stop when requested or prevent garbage collecting of > webapp when reloading. Consider using an existing thread pool component. It should have a graceful shutdown capability already built into it. David is right: you have to make sure to shut it down when appropriate. > In general, try to avoid spawning your own thread. I agree, which is why I recommend using a thread pool. Yes, you are still technically spawning your own threads (the container will not do it for you), but the point is that you will not be spawning a thread for each request. Set up your thread pool to have a "reasonable" number of threads for your application. You do not want to have loads of users submit jobs that will each spawn a new thread. If you run out of threads in the thread pool, you simply tell the user to come back later. Management of this type of resource is essential to maintaining a stable and useful system. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFvgK+9CaO5/Lv0PARAoIFAJ45DgOyFV9qxS2e+Qt9uHNTtkWpywCdHbnq pltJVjDsmhZMg0143155k7M= =pbEp -----END PGP SIGNATURE----- --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
