Avoid sharing script objects or script arrays across threads (this includes global.) Sharing script objects is asking for trouble. Share only primitive data types, or Java objects.
One of the most common questions posted on our Multithreaded Java programming discussion forum is some version of how to create a thread pool. In nearly every server application, the question of thread pools and work queues comes up. In this article, Brian Goetz explores the motivations for thread pools, some basic implementation and tuning techniques, and some common hazards to avoid.
I got this idea to create a servlet filter, that would inspect the thread-local store for the thread currently processing the request and log any thread-local references that exist before the request is dispatched down the chain and also when it comes back. Such a servlet could be packaged as a Confluence Servlet Filter Plugin, so that it is convenient to develop and deploy it.
This package is the backport of java.util.concurrent API, introduced in Java 5.0 and further refined in Java 6.0, to older Java platforms. The backport is based on public-domain sources from the JSR 166 CVS repository, the dl.util.concurrent package, and