[Search] if service name is selected only show relevant span names

[ToonTijtgat2]

Describe the bug While exploring the tracing via the tempo datasource in grafana the drop down possibilities are not relevant. If I select a Resource Service name first and then try to select a Span name from the dropdown it shows the possibilities of all resource names instead of only from the selected one.

This is causing to have empty searches and confusion. if the span name does not exist for the Resource Service name it gives no results.

To Reproduce Steps to reproduce the behavior:

1. Open the tempo datasource in grafana
2. Select a Resource Service Name
3. Open the Select value dropdown of Span name and you'll find all possible span names instead of the once related to the selected Resource Service Name

Expected behavior I expect that if I select a Resource Service name that the next dropdown's would be relevant to this service name. Like it's also for loki/mimir when you have a label selected, and you try to filter down on an extra label, it only show the labels relevant for the previous selection.

Environment:

• Infrastructure: Kubernetes
• Deployment tool: helm
• Version: 2.3.1

[ToonTijtgat2]

This issue is a duplicate of https://github.com/grafana/grafana/issues/81776 since I'm not sure if it's for the grafana team or tempo team.

[joe-elliott]

This has been fixed in Tempo here: https://github.com/grafana/tempo/pull/2433/files

It's currently behind a feature flag, but that was defaulted to true here: https://github.com/grafana/tempo/pull/3178

The next version of Tempo and latest Grafana will filter span names (and all other tags) as desired.

[pingping95]

which do you expect new tempo version release?

[joe-elliott]

Likely later this month/early next month.

[nirmaljeet-singh-groww]

Thanks a lot for fixing it :)

[github-actions[bot]]

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[ToonTijtgat2]

closed with https://github.com/grafana/tempo/pull/3178 and released in 2.4.0