- Document Information
- Preface
- 1. Diagnostic Tools and Options
- 2. Detailed Tool Descriptions
- 2.1 HPROF - Heap Profiler
- 2.2 Java VisualVM
- 2.3 JConsole Utility
- 2.4 jdb Utility
- 2.5 jhat Utility
- 2.6 jinfo Utility
- 2.7 jmap Utility
- 2.8 jps Utility
- 2.9 jrunscript Utility
- 2.10 jsadebugd Daemon
- 2.11 jstack Utility
- 2.12 jstat Utility
- 2.13 jstatd Daemon
- 2.14 visualgc Tool
- 2.15 Ctrl-Break Handler
- 2.16 Operating-System-Specific Tools
- 2.17 Developing Diagnostic Tools
- 3. Troubleshooting Memory Leaks
- 3.1 Meaning of OutOfMemoryError
- 3.2 Crash Instead of OutOfMemoryError
- 3.3 Diagnosing Leaks in Java Language Code
- 3.4 Diagnosing Leaks in Native Code
- 4. Troubleshooting System Crashes
- 5. Troubleshooting Hanging or Looping Processes
- 6. Integrating Signal and Exception Handling
- 7. Submitting Bug Reports
- 7.1 Checking for Existing Fixes in Update Releases
- 7.2 Preparing to Submit a Bug Report
- 7.3 Collecting Data for a Bug Report
- 7.4 Collecting Core Dumps
- A. Environment Variables and System Properties
- B. Command-Line Options
- C. Fatal Error Log
- D. Summary of Tools in This Release
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Troubleshooting Guide for HotSpot VM
December 2022
This document is a guide to help troubleshoot problems that might arise with applications that are developed using the release of Java Platform, Standard Edition Development Kit 7 (JDK 7). In particular, this guide addresses possible problems between the applications and the Java HotSpot virtual machine. The document provides a description of the tools, command line options, and other help in analyzing a problem. The document also provides guidance on how to approach some general issues such as a crash, hang, or memory resource issues. Finally, the document provides direction for data collection and bug report preparation.
