Overview

This article provides information that's pertinent when the Surveyor agent cannot contact the Surveyor server.

Information

Surveyor agents attempt to contact the PMP web service whenever the agent service starts.

Any time the agent successfully exchanges messages with the PMP service, it should receive a message specifying how long to wait until its next message exchange. Most of the time, this interval is configurable in the server-side. For example, WOW proxies perform long polls against the PMP service and will normally be told by the server to start the next message exchange immediately.

If the agent fails to communicate with the PMP service, it will increase its polling interval based on an exponential interval up to a maximum value configured by the installer property PMP_MAX_BACKOFF. The interval for the next check-in is calculated using the following formula:

seconds until next check-in = min ( PMP_MAX_BACKOFF, s + 5 # of failures ) - 1

Where s is the number of seconds last returned by the PMP service.

The default value for the PMP_MAX_BACKOFF is 15 minutes.