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Troubleshooting
The Java HotSpot Fatal Error Log (hs_err_[pid] log)
The fatal error log is created when a Java process encounters a fatal error. Knowing how to find and interpret the fatal error log is essential to troubleshooting Java applications.
Application Symptoms
If your application is not functioning correctly, and you are not sure why, this is the best place to start. Symptoms covered here include application hangs, long or frequent garbage collections, CPU or memory use, crashes, and many others. This section will walk you through understanding the symptom, diagnosing possible causes, and help you find a resolution.
Causes of Issues
If you know what is causing your application's symptoms, or have a theory, begin here. This section will take you directly to detailed instructions for resolving the cause of your application's symptoms.
Exceptions, Errors, and Other Messages
Do you have an exception or error message that you would like to resolve? This section explains the causes of, and solutions to, numerous types of messages.
Security
Jump right to detailed articles on troubleshooting security-related issues.
JVM Performance
This section discusses the various performance issues that might arise, how to identify them, and the tools and troubleshooting techniques that can be used to resolve them.