Azure Alert Action connected to Logic App Webhook firing twice every time an alert is triggered

Question

I'm having this strange issue with Azure Monitor where an alert action that is pointing to a webhook is firing twice every time it gets triggered. (I'm assuming it isn't the alert that is firing twice necessarily but the Logic App that is receiving it that is firing twice for some reason)

Action Alert Setup

Action Timestamp

Related Logic App Sample Run History

Basic Logic App Setup

Is this a common problem with hooking up action alerts to webhooks or logic apps or is there some setting I need to be aware of to prevent this?

Answer 1

Please check the monitor condition of your second alert message. Probably it is sending notification with monitor condition resolved. For now it is not possible to disable triggering action group with resolved monitor condition but you can modify your webhook endpoint to ignore resolved state. Please check this issue: https://feedback.azure.com/forums/267889-azure-monitor-log-analytics/suggestions/37167487-send-alerts-with-resolved-state-for-log-alert-rule