Intermittent Freeze on Panel Scrolling

[lux4rd0]

Hello—I'm using this MQTT plugin to visualize data coming from Eclipse Mosquito and have run into similar issues as others here—the window tends to stop scrolling. I have tried the 1-minute and 5-minute relative windows.

I am using MQTT version 1.1.0-beta.1, Grafana version v11.1.3 (da5a557b6e), with Heatmap Visualization.

I can see the data is still being brought from the queue using the query inspector, and the JSON data source is working; it's just not displaying the data. I can refresh the entire dashboard—sometimes, that will show things again. Sometimes, it'll show all of the data that has been loaded but still not scroll. Sometimes, it'll work perfectly.

Because I want to use timestamps from the JSON payload instead of when the message arrives, I have three transformations: organize fields by name, covert field type, and filter data by values. Sometimes, disabling them works, and other times, it makes no difference. I think that's really about recycling whatever hang-up there is in the scrolling mechanism rather than the cause of the issue. Having all three disabled doesn't always make it start scrolling again.

Restarting Grafana, stopping and starting the MQTT process, or sending data doesn't change things.

Because my symptoms are similar to others here, I'm starting here. However, using different visualizations (like simply using the Time series visualization) does not seem to have this problem.

But as I type this out - it's working great in the edit panel. Until I refresh the page. :)

Edit: I did some more testing with time series and Business Charts, and the data stops after 30 seconds or so for those as well. (Although they seem to always start on a page refresh, whereas heatmaps sometimes do and sometimes don't. I am wondering if there is something else going on with the streaming backend - as when I watched the query inspector - it simply stopped at 29.8 seconds until I refreshed the query - the next time, it stopped at 49.9 seconds - then started back up for a few seconds - then hung... then jumped ahead to 2 minutes... Then stopped altogether)