A ColdFusion system probe is a test program that verifies the availability of a specific URL or string in an HTTP response.
In order for a ColdFusion system probe to verify the availability and integrity of a resource in your website, it requests a URL at a specified frequency. The probe then scans the returned HTML page for a match of a specified search string. Depending on the results of that scan and match, the probe test succeeds or fails:
Test succeeds when the returned page contains the anticipated search string within the time-out interval specified. Inbound HTTP requests are then continuously sent to the server for which the probe exists, and an OK status appears on the System Probe page.
Test fails when a probe validation test fails, as a result of a URL failure, a time-out, or the anticipated search string does not match, you can instruct ColdFusion to do any or all of the following:
Send an e-mail notification.
Execute a program to run when it detects a failure.