From the time of the rule being enabled, the system looks for any pipeline failure over the past 60 seconds then continues to check every minute. During this period if the count of pipeline failure is exceeding or equal to 1, the alert rule fires. Depending on the mode of notification configured, an Email/SMS/Voice call is sent to the action group notifying that the alert was activated.
If there is a consecutive pipeline failure during the evaluation window, the alert condition remains fired. If the pipeline execution is successful, the value becomes less than the threshold count. This condition should be satisfied for three healthy executions which will move the alert to the resolved condition. A notification will then be sent for Alert Deactivation.
The alert condition must change to resolved before further alerts can be triggered for that specified metric. The alert condition is controlled by the system whereas the state of the alert can be modified by the user.