Grafana Alerts return: `rpc error: code = Unknown desc = invalid status code`

Hello Team,

Thank you so much the continued work on this amazing, vital plugin for Grafana.

While trying the Alerting support on Grafana v7.3.3 (2489dc4d3a) I’m always receiving the following error. Mind the timeseries are correctly returned and displayed. Any suggestion?

clickhouse-grafana query:

$columns(ruri_user, avg(mos) c ) FROM $table WHERE mos > 0

clickhouse-grafana error:

{
  "firing": true,
  "state": "pending",
  "conditionEvals": " = true",
  "timeMs": "6.302ms",
  "error": "tsdb.HandleRequest() error rpc error: code = Unknown desc = invalid status code. status: 500 Internal Server Error",
  "logs": [
    {
      "message": "Condition[0]: Query",
      "data": {
        "from": 1605875259316,
        "queries": [
          {
            "refId": "A",
            "model": {
              "database": "hepic_data",
              "dateColDataType": "",
              "dateLoading": false,
              "dateTimeColDataType": "record_datetime",
              "dateTimeType": "DATETIME",
              "datetimeLoading": false,
              "extrapolate": true,
              "format": "time_series",
              "formattedQuery": "SELECT $timeSeries as t, count() FROM $table WHERE $timeFilter GROUP BY t ORDER BY t",
              "intervalFactor": 1,
              "query": "$columns(ruri_user, avg(mos) c ) FROM $table WHERE mos > 0",
              "rawQuery": "SELECT t, groupArray((ruri_user, c)) AS groupArr FROM ( SELECT (intDiv(toUInt32(record_datetime), 20) * 20) * 1000 AS t, ruri_user, avg(mos) c FROM hepic_data.sip_transaction_call WHERE record_datetime >= toDateTime(1605776207) AND mos > 0 GROUP BY t, ruri_user ORDER BY t, ruri_user) GROUP BY t ORDER BY t",
              "refId": "A",
              "round": "0s",
              "skip_comments": true,
              "table": "sip_transaction_call",
              "tableLoading": false
            },
            "datasource": {
              "id": 5,
              "name": "ClickHouse"
            },
            "maxDataPoints": 0,
            "intervalMs": 0
          }
        ],
        "to": 1605875559316
      }
    }
  ]
}

[lmangani]

btw @Slach we have golang devs in our team working on cloki-go, if you want we we can help or team up - ping @adubovikov

[lmangani]

After a little back and forth with Grafana failing auth, it works! Thank you so much and again apologies for the duplicate