IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools > Using Javadump

Interpreting a Javadump

This section gives examples of the information contained in a Javadump and how it can be useful in problem solving.

The content and range of information in a Javadump might change between JVM versions or service refreshes. Some information might be missing, depending on the operating system platform and the nature of the event that produced the Javadump.

• Javadump tags
  The Javadump file contains sections separated by eyecatcher title areas to aid readability of the Javadump.
• TITLE, GPINFO, and ENVINFO sections
  At the start of a Javadump, the first three sections are the TITLE, GPINFO, and ENVINFO sections. They provide useful information about the cause of the dump.
• Native memory (NATIVEMEMINFO)
  The NATIVEMEMINFO section of a Javadump provides information about the native memory allocated by the JRE.
• Storage Management (MEMINFO)
  The MEMINFO section provides information about the Memory Manager.
• Locks, monitors, and deadlocks (LOCKS)
  An example of the LOCKS component part of a Javadump taken during a deadlock.
• Threads and stack trace (THREADS)
  For the application programmer, one of the most useful pieces of a Java dump is the THREADS section. This section shows a list of Java threads, native threads, and stack traces.
• Shared Classes (SHARED CLASSES)
  An example of the shared classes section that includes summary information about the shared data cache.
• Class loaders and Classes (CLASSES)
  An example of the classloader (CLASSES) section that includes Classloader summaries and Classloader loaded classes. Classloader summaries are the defined class loaders and the relationship between them. Classloader loaded classes are the classes that are loaded by each class loader.

Parent: Using Javadump

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