QCon is a practitioner-driven conference designed for technical team leads, architects, and project managers who influence software innovation in their teams.

Jevgeni Kabanov, Founder and CTO of ZeroTurnaround

Jevgeni Kabanov

Biography: Jevgeni Kabanov

Jevgeni Kabanov is the founder and CTO of ZeroTurnaround (www.zeroturnaround.com), a development tools company that focuses on productivity. He wrote the first version of the ZeroTurnaround flagship product, JRebel, a class-reloading JVM plugin. Jevgeni has been speaking at international conferences for over 5 years, including JavaOne, Devoxx/JavaPolis, JavaZone, JAOO, QCon, TSSJS, JFokus and others. Jevgeni also started the first Java conference in Estonia, Geekout. He has an active research interest in programming languages, types and virtual machines, publishing several papers on topics ranging from category theoretical notions to typesafe Java DSLs. Jevgeni is on the Expert Group for the JSR 342 (Java EE 7). He has started two open-source projects -- Aranea and Squill.

You can follow Jevgeni on Twitter as @ekabanov. See http://lanyrd.com/people/ekabanov/ for conference history and schedule. ojects.

Presentation: Do you really get class loaders?

Track: Java Platform (hard-core Java) / Time: Wednesday 11:50 - 12:50 / Location: Henry Moore Room

Class loaders are at the core of the Java language. Java EE containers, OSGi, NetBeans modules, Tapestry 5, Grails and many others use class loaders heavily. Yet when something goes wrong, would you know how to solve it? 
In this session we'll take a tour of the Java class loading mechanism, both from JVM and developer point of view. We will look at typical problems that you get with class loading and how to solve them. ClassNoDefError, IncompatibleClassChangeError, LinkageError and many others are symptoms of specific things going wrong that you can usually find and fix. For each problem we'll go through a hands on demo with a corresponding solution.
We'll also take a look at how and why classloaders leak and how can you remedy that.