HP-UX SNAplus2 Diagnostics Guide

Overview of Problem Solving
Types of Diagnostic Information
Chapter 122
Often a program error message is accompanied by log messages that
provide additional information (For information about this error log file,
see “Types of Log Information”).
Log Messages
When a program is executing, different events such as starting or ending
a session occur. SNAplus2 records log messages for these and other
events in log files to provide you with specific information about the
internal activities of SNAplus2. Other internal activities of SNAplus2
that are logged include port initialization, security checks, and network
link station failures.
SNAplus2 logs messages for normal events (such as starting the session)
and for abnormal events (such as unexpected session termination and
resource shortage). For each event, the messages describe what
happened, when, and where. You can disable some types of logging (see
“Determining Which Messages Are Logged”) and control the amount of
detail recorded in the logs (see “Choosing the Format of Logs”). One log
file can contain more than one type of message.
Types of Log Information
SNAplus2 categorizes events by severity and groups them into one of
three types.
Problem
An abnormal system event that degrades system
performance in a way that is easily perceived by a user
(for example, abnormal termination of a session).
SNAplus2 always logs these events. You cannot disable
logging of these events.
Exception
Exception events fall into two categories:
• Abnormal system events that degrade system
performance but are not immediately perceived by a
user (for example, a resource shortage).
• Events that do not degrade system performance but
may indicate the cause of later exceptions or
problems. An example is receiving an unexpected