The Jakarta Apache Project has posted Tomcat 5.5.7, an open source servlet container for the Apache web server and the official reference implementation of the Java Servlet API and Java Server Pages (JSP). "Tomcat 5.5 is designed to run on J2SE 5.0 and later, and requires configuration to run on J2SE 1.4....In addition, Tomcat 5.5 uses the Eclipse JDT Java compiler for compiling JSP pages. This means you no longer need to have the complete Java Development Kit (JDK) to run Tomcat, but a Java Runtime Environment (JRE) is sufficient. The Eclipse JDT Java compiler is bundled with the binary Tomcat distributions. Tomcat can also be configured to use the compiler from the JDK to compile JSPs, or any other Java compiler supported by Apache Ant." This implements version 2.4 of the Java Servlet API and version 2.0 of Java Server Pages. Changes since 5.5.6 include an installer for mod_jk on IIS, a new store config module for better server.xml saving support, and updates to varous components. The version numbering is funky. This is really more like an alpha release and is definitely not considered to be ready for production.
YourKit, LLC has posted the sixth public beta of YourKit Java Profiler 4.0, a 295€ payware tool for detecting memory leaks and memory consumption bottlenecks. It features Automation of memory leak detection, an object heap browser, JUnit integration, IntelliJ IDEA, Borland JBuilder integration. Version 4.0 adds support for Mac OS X and simplifies analysis of custom class loaders and the classes they load. This beta can now measure time spent and objects created in a method but not the descendant methods it invokes.