Alert doesn't work correctly

[tmanh17]

What happened:

Alert doesn't work correctly. It always send No Data alert

What you expected to happen:

It notify alert if it happens actually

How to reproduce it (as minimally and precisely as possible):

1. Install vertamedia-clickhouse-datasource plugin v2.3.1
   1.1. Download the plugin https://github.com/Vertamedia/clickhouse-grafana/releases/tag/v2.3.1
   1.2. Unzip to /var/lib/grafana/plugins/
   1.3. restart grafana-server
2. create a dashboard and panel that use ClickHouse Datasource then create an alert for this.

3. click Test rule or add a channel email for this alert

Case 1 get No Data alert although it doesn't exist

Case 2 Should be an alert for high value instead of No Data notification

Environment:

• Grafana version: v7.4.2
• Plugin version: v2.3.1
• OS Grafana is installed on: Debian 8.5
• User OS & Browser: Ubuntu 20.04 & Chrome
• Others:

[Slach]

Thanks for reporting, could you share alert tab screenshot in your panel or just share full panel JSON?

[tmanh17]

I tried default value and then tried to change some parameters as the following. It has the same result (both cases mentioned above)

Panel JSON: panel.zip

[Slach]

@tmanh17 did you try to SAVE whole dashboard after change in "alerts"?

[winofi]

Are you using GET and your server does not support POST?

[SachChen]

I have met a same problem, from the grafana's log , i found the vertamedia-clickhouse-datasourc plugin has been restarted , it seems like that the plugin has dumped when the response of clickhouse's data is too much，just in version v2.3.1 but not only!