IBM User Guide for Java V7 on Windows > Reference

Messages

Messages are issued by the IBM Javaâ„¢ Virtual Machine (JVM) in response to certain conditions.

There are three main categories of message:

Information

Information messages provide information about JVM processing. For example, a dump information message is typically issued when a dump agent requests a Java dump.

Warning

Warning messages are issued by the JVM to indicate conditions that might need user intervention.

Error

Error messages are issued by the JVM when normal processing cannot proceed, because of unexpected conditions.

IBM JVM messages have the following format:

JVMTYPENUM&

where:

• JVM is a standard prefix.
• TYPE refers to the JVM subcomponent that issued the message.
• NUM is a unique numerical number.
• & is one of the following codes:
  • I - Information message
  • W - Warning message
  • E - Error message

These messages can help you with problem determination. Refer to diagnostic information for more detailed information about diagnosing problems with the IBM JVM.

By default, all error and some information messages are routed to the system log and also written to stderr or stdout. The specific information messages are JVMDUMP039I, JVMDUMP032I, and JVMDUMP033I, which provide valuable additional information about dumps produced by the JVM. To route additional message types to the system log, or turn off message logging to the system log, use the -Xlog option. The -Xlog option does not affect messages written to the standard error stream (stderr). See JVM command-line options.

• Finding logged messages
  Logged messages can be found in different locations, according to platform.
• Obtaining detailed message descriptions
  Detailed message information is available to help with problem diagnosis.

Parent: Reference

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