URI Too Long error for Non-Token Aware widget

[martin-sucha]

Installation details
Panel Name: Non-Token Aware queries
Dashboard Name: Scylla CQL
Scylla-Monitoring Version: Not sure, says master. In any case, the current master (c313539) seems to be affected as well as I checked the code.
Scylla-Version: 2021

Description
We encountered a HTTP 414 URI too long error from Prometheus when rendering "Non-Token Aware queries" widget. This was because all the values for node variable were concatenated in the query. The query for the widget combines multiple metrics together, so this list was repeated multiple times. This can be fixed by specifying .* as All value for the template variable, which will make the query shorter.

All template variables should be updated to have "allValue": ".*" in their JSON definition so that Grafana does not list all the options in case "All" is selected.

[martin-sucha]

This was visible in Grafana as "An error occurred within the plugin"