Oracle Service Bus – Stuck Thread Case Study

This case study describes the complete root cause analysis process of a stuck thread problem experienced with Oracle Service Bus 11g running on AIX 6.1 and IBM Java VM 1.6. This article is also a great opportunity for you to improve your thread dump analysis skills and I highly recommend that you study and properly understand the following analysis approach. It will also demonstrate the importance of proper data gathering as opposed to premature...

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5 tips for proper Java Heap size

Determination of proper Java Heap size for a production system is not a straightforward exercise. In my Java EE enterprise experience, I have seen multiple performance problem cases due to inadequate Java Heap capacity and tuning. This article will provide you with 5 tips that can help you determine optimal Java heap size, as a starting point, for your current or new production environment. Some of these tips are also very useful regarding the...

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java.lang.NoClassDefFoundError: How to resolve – Part 3

This is part 3 of our java.lang.NoClassDefFoundError troubleshooting series. As I mentioned in my first article, there are many possible problems that can lead to java.lang.NoClassDefFoundError such as a wrong Java runtime classpath. This article will describe one of the most common causes of this problem: failure of Java class static initializer blocks or static variables. A sample Java program will be provided and I encourage you to compile and run this example from your workstation in order to properly replicate and understand this type of problem. Java static initializer revisited The Java programming language provides you...

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