Log Format

The Jarvis script will generate log output in certain situations. If enabled, it will also generate a significant amount of detailed debug and/or dump output which is potentially useful for identifying problems where client requests are not being processed as expected.

The log format string specifies the format which is used for log, debug and dump output. This is a string which may contain the following placeholders:

Attribute Notes
%T Timestamp of log event, e.g. Mon Jul 06 09:41:33 2025.
This is not generally required since the Apache error log output already contains a timestamp.
%H High Resolution Timestamp providing time up to microseconds, e.g. Mon Jul 06 09:41:33.072831 2025.
Accuracy is restricted by system clock.
%L Level of output, either log or debug.
%U Current logged-in username.
%D Requested dataset name.
%A Requested application name.
%P Process ID of spawned sub process.
%S The session ID of the current user’s session.
All requests will have a session.
%R The request ID of the HTTP request. This is a UUID, unique to the HTTP request.
%M Message text to be logged.