Datasource NoData Alerts Every 5 minutes

Grafana Alerting
1

  • What Grafana version and what operating system are you using?

    • v12.3.2 - Debian 12 (Bookworm)

  • What are you trying to achieve?

    • I have an older instance of Grafana running and I am simply attempting to rebuild it. The Grafana and Telegraf configurations are exactly the same but there are about 4 instances of inputs.snmp that seem to show NoData every 5 minutes and then resolve after 1 minute. These are exact times.
    • On the previous version I don’t have this issue. I need a way to either stop this notification or make it so that NoData alerts don’t appear instantly.
    • InfluxDB is being used as the datasource.

  • How are you trying to achieve it?

  • What happened?

  • What did you expect to happen?

  • Can you copy/paste the configuration(s) that you are having problems with?

  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.

    • No errors specific to this issue, unfortunately.

  • Did you follow any online instructions? If so, what is the URL?

1 Like
3

If no data set alert state to normal.

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4

I still want to know if the data source actually is not sending data though, is the problem. I just can’t think of why it’s firing every 5 minutes on the dot and how I can optimise this.

Increasing the interval on Telegraf seems to resolve the issue but again it means that I see different data compared to my previous instance.

5

Hi, just adding a few additional comments in case they help:

NoData means the query is successful but returns no data or only null values.
NoData is different from Error, which refers to connectivity or execution errors.

The evaluation interval in the evaluation group determines how frequently the alert rule is evaluated: every 1m, 3m, 5m, etc.

What is the evaluation interval configured for this rule?

And which notification policy or contact point is responsible for handling the notifications?

For details on how notifications are sent, see: Group alert notifications | Grafana documentation

  • Similar alerts may be grouped together.
  • The timing options determine when notifications are sent.
  • The 5m cadence might be coming from the default group interval setting.

It’s a common practice to handle NoData/Error alerts using a dedicated notification policy. For details on these alerts, see: No Data and Error states | Grafana documentation