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From Apache Wiki <>
Subject [Tomcat Wiki] Update of "TomcatTrackNA10_PMC_Sessions" by markt
Date Fri, 19 Mar 2010 08:04:44 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Tomcat Wiki" for change notification.

The "TomcatTrackNA10_PMC_Sessions" page has been changed by markt.
The comment on this change is: Add memory leak idea.


   . Jean-Frederic has spent more than 20 years writing client/server software. He is committer
in APR, Jakarta, Httpd and Tomcat and he likes complex projects where different languages
and machines are involved. Born in France, Jean-Frederic lived in Barcelona (Spain) for 14
years. Since May 2006 he lives in Neuchatel (Switzerland) where he works for [[|RedHat]]
in the JBoss division.
+ ==== New memory leak prevention and detection features in Tomcat 7 ====
+ By Mark Thomas
+  . It is all too easy to trigger a memory leak within a web application, particularly in
PermGen when the application is reloaded. These leaks are often the unintended and unexpected
consequences of using a library or even parts of the standard Java APIs. This session will
explore the various ways these leaks can be triggered, how to diagnose them when they occur
and the techniques that can be used to avoid them. The session will be based around the successful
memory leak prevention code recently added to Apache Tomcat codebase although the causes,
process of diagnosis and the remedies are widely applicable to any J2EE application server
or, in fact, any other environment that provides a 'reload' mechanism that uses multiple class
+  . Mark has been using and developing Tomcat for over six years. He first got involved in
the development of Tomcat when he needed better control over the SSL configuration than was
available at the time. After fixing that first bug, he started working his way through the
remaining Tomcat bugs and is still going. Along the way Mark has become a Tomcat committer
and PMC member, volunteered to be the Tomcat 4 & 7 release manager, created the Tomcat
security pages, become a member of the ASF and joined the Apache Security Committee. He also
helps maintain the ASF's Bugzilla instances. Mark has a MEng in Electronic and Electrical
Engineering from the University of Birmingham, UK and is currently a Senior Software Engineer
with the SpringSource Division of VMWare. 

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