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Odd practices in Java

Overview There are a number of practices in Java which oddly baffle me. Here are but a few. Using -Xmx and -Xms The option -Xmx is widely used to set the maximum memory size. As noted ...
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Tracking excessive garbage collection in Hotspot JVM

Quite frequently due to memory leaks or other memory problems applications freeze leaving only the garbage collector (GC) process running unsuccessfully trying to free some space. ...
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Java Thread deadlock – Case Study

This article will describe the complete root cause analysis of a recent Java deadlock problem observed from a Weblogic 11g production system running on the IBM JVM 1.6. This case ...
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JavaOne 2012 – 2400 hours to go! Some recommendations

As you might have seen the JavaOne 2012 Content Catalog is online. The Program Committee had some very intense weeks of sorting, reviewing, rating and discussing ...
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java.lang.NoClassDefFoundError: How to resolve – Part 2

This article is part 2 of our NoClassDefFoundError troubleshooting series. Take a look at part 1. It will focus and describe the simplest type of NoClassDefFoundError problem. This ...
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Just in Time Compiler (JIT) in Hotspot

The Just In Time Compiler (JIT) concept and more generally adaptive optimization is well known concept in many languages besides Java (.Net, Lua, JRuby). In order to explain what is ...
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A Birds’s Eye View of Maven

One of the things that we do on a daily basis is use Maven to build our projects by issuing build commands such as mvn install. Maven then looks at our project’s configuration file, ...
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java.lang.NoClassDefFoundError: How to resolve – Part 1

Exception in thread ‘main’ java.lang.NoClassDefFoundError is one of the common and difficult problems that you can face when developing Java EE enterprise or standalone ...
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How to analyze Thread Dump – IBM VM

This article is part 4 of our Thread Dump analysis series which will provide you with an overview of what is a JVM Thread Dump for the IBM VM and the different Threads and data points ...
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Java Decompiler in JDeveloper

Java Decompiler is a standalone graphical utility that displays Java source codes of  “.class” files. Below is snapshot of Java Decompiler program ...
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