Case Studies

This page provides a consolidated and split view of all the case studies available from this Blog on Java, middleware such as Weblogic, Java EE, JVM and more.

Simply browse through the different sections and select the topic of your choice. 
As usual, please feel free to post any question or comment on any topic.

Java

HashMap problems

• HashMap.get High CPU
• HashMap infinite loop problem
• HashMap Thread safe problem

Middleware

Weblogic & JVM memory problems

• Java Heap leak using Weblogic 10.0 and Apache Lucene 2.3.2
• OutOfMemoryError – Oracle Service Bus Alerts
• OutOfMemoryError using Oracle Weblogic 10.0 and JRockit
• MMAP File OutOfMemoryError and pmap
• OutOfMemoryError using JAX-WS Web Service, EJB3 and JBoss 5
• OpenJPA: Memory Leak Case Study

Weblogic stuck thread problems

• Oracle Service Bus – Stuck Thread
• Log4j Thread Deadlock – A Case Study

Weblogic JDBC Datasources problems

• Connection pool leak using Hibernate 3.2.3 and Weblogic 10.3
• Connection pool leak using Weblogic 9.0

Weblogic SSL problems

• CertPathValidatorException Certificate chaining error using Weblogic 11g and IBM JSSE

  

Weblogic common problems

• Oracle OSB - Too many open files

Tomcat thread race problems

• Thread race condition using Tomcat 4.1 and Oracle 10g

Web Services

JAXB problems

• JAXBContext Performance Problem

.NET

Thread hangs problems

• net framework 4 - DebugDiag tutorial

Database

Connectivity problems

• The network adapter could not establish the connection - Problem patterns
• Network Adapter could not establish the connection problem using Weblogic 8.1