Seeing following [WARN] message in the IntroscopeAgent.log occasionally:

[WARN] [IntroscopeAgent.Agent] Agent_Transaction_Trace_UserID_Not_Configured

What does the [WARN] message "Agent_Transaction_Trace_UserID_Not_Configured" mean? How can I configure the Agent Transaction User ID?

CA Application Performance Management Agents

This [WARN] message is informational. It is logged when no user id is captured from your application through the three ways as configured in the following section of the IntroscopeAgent.profile.

#######################
# Transaction Tracer Configuration
#
# ================
# Configuration settings for Introscope Transaction Tracer

 # The following settings configure Transaction Tracer to optionally
# capture the user ID used to invoke servlets and JSPs if it is stored
# in one of the three following ways.  Uncomment the set of properties
# that correspond to how user IDs are stored in your application.
# Make sure only one set of properties are uncommented or the wrong
# properties could be used.

This setting is optional and the [WARN] message can be safely ignored if tracing of User ID is not required. 

For more details on how to configure the User ID collection, please see Collecting User ID Data