# Alarms

The **Alarms** page in the EMQX Dashboard displays both currently active alarms and historical (cleared) alarms. This allows administrators to monitor and manage system anomalies in real time.

Each alarm record contains the following details:

- **Name**: Identifier of the resource or component raising the alarm (e.g., connector, plugin, etc.)
- **Message**: The specific error message or description (e.g., `resource down: timeout`)
- **Trigger Node**: The EMQX node that reported the alarm
- **Level**: The severity level (e.g., Warning, Critical)
- **Activate At**: Timestamp when the alarm was triggered
- **Duration**: How long the alarm has remained active

## Active Alarms

On the **Active** tab, you can view all alarms that are currently active in the system.

### Available Actions:

- **Refresh**: Click the **Refresh** button to update the list with the latest alarm data.
- **Settings**: Click **Settings** to navigate to the [Monitoring](./cluster_settings.md#monitoring) settings page, where you can configure alarm trigger thresholds and check intervals.
- **Set Up Webhook**: Click **Set Up Webhook** to enable webhook-based notification for alarm events. For setup details, refer to [Integrate Webhook to Send Alarm Events](../observability/alarms.md#integrate-webhook-to-send-alarm-events).
- **Deactivate (Manual)**:
   In some cases, alarms (e.g., from client disconnections or resource timeouts) may not automatically resolve.
   Click the **Deactivate** button in the **Actions** column to manually clear the alarm.

> **Tip**: Manual deactivation should only be used when automatic recovery is not triggered, such as after a disconnected client or failed connector that no longer exists.

**Example**

The image below shows an active system alarm triggered by a failed MQTT connector (`connector:mqtt:qwe`) due to a resource timeout. The **Deactivate** button is available to manually resolve this alarm if necessary.

<img src="./assets/alarm.png" alt="image" style="zoom:67%;" />

## Historical Alarms

Navigate to the **History** tab to view past alarms that have been cleared or deactivated. Click **Clear History Alarms** to remove historical alarm records from the Dashboard.

## Additional Information

For a comprehensive list of supported alarm types, how alarms are triggered, and webhook payload structure, refer to the [Alarms Documentation](../observability/alarms.md).