> From: Thad Humphries [mailto:thad.humphr...@gmail.com] > Subject: Re: Problems with ImageIO > > (1) This leak situation may arise when I use "stop" or > "reload" on my webapp.
Correct. The JRE keeps a global imageio registry with a reference to a webapp-specific class, resulting in a slow PermGen memory leak. > (2) It can also be prevented by placing my JAI and JAI-IMAGE > I/O jars in CATALINA_HOME/lib or JAVA_HOME/jre/lib/ext vs my > WEB-INF/lib. Also correct, since the classes will now be loaded by a global classloader, rather than a webapp-specific one. > I prefer to keep the jars in my WEB-INF/lib as it's less > intrusive to the server manager. Which includes being easier for anyone installing your webapp. Unfortunately, you have to pick one poison or the other, since Sun mostly ignored their servlet-spec-required isolation of webapps when designing the numerous global registries. I suppose you might try a ServletContextListener that deregisters the JAI classes when your webapp is being shut down. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
