tonypowa
commented
4 months ago This issue is a test copy of an issue in another repo. Original issue: https://github.com/grafana/grafana/issues/#84737
Open tonypowa opened 4 months ago
tonypowa
commented
4 months ago This issue is a test copy of an issue in another repo. Original issue: https://github.com/grafana/grafana/issues/#84737
moxious
commented
4 months ago Summary: User tonypowa reported an issue with Grafana 10.4.0 where a log panel begins outputting an infinite loop of empty logs after a few minutes, despite the actual MQTT data source sending log messages only once per second with content. Refreshing the page temporarily fixes the problem, suggesting the issue lies in the log panel rather than the MQTT data source.
moxious
commented
4 months ago Hello @tonypowa, thanks for reporting this issue. It seems like the problem revolves around the MQTT datasource in combination with the log panel. The Grafana plugin that appears to handle the functionality is a good candidate for further investigation. You might want to report this issue in the Plugins Platform project to ensure it receives attention from the appropriate team.
moxious
commented
4 months ago Elaboration:
Hello @tonypowa, thank you for providing a detailed description of the issue with Grafana's log panel. In order to assist you better and potentially identify the problem, we need a bit more information:
Can you confirm if there are any error messages in the Grafana server logs or JavaScript console in the browser when the log panel starts spooling out empty logs?
Could you provide the MQTT datasource configuration, ensuring any sensitive information such as passwords or access tokens are redacted?
Is there a pattern to when the issue starts occurring, such as when the dashboard has been running for a specific amount of time, or after a certain number of log messages have been received?
Are there any other network conditions or events that seem to coincide with the issue starting, such as peak usage times or network instability?
You mentioned the issue is resolved temporarily by refreshing the page. Does this happen in other browsers as well, or have you experienced this only in Firefox?
Could you please share more details about your Docker setup, including the Docker version and any relevant configuration details for the Grafana container?
Are you able to reproduce this issue in a different setup/environment (e.g., local installation without Docker, different machine, etc.)?
Any additional information or observations that you think might be relevant to diagnose the issue would be greatly appreciated. Feel free to attach any logs or configurations that could help us investigate further.
Thank you!
What happened?
Grafana 10.4.0 (latest as of writing)
I am streaming log messages to a log panel from an MQTT datasource. It works fine for a few minutes, and then the log panel starts spooling out empty logs at a very high rate:
The actual logs are only being sent once per second, and always contain some kind of content.
Hitting refresh on the page temporarily corrects the issue, but it quickly comes back.
I have other types of visualization working with MQTT, so I think the problem is in the log panel, not in the MQTT datasource.
What did you expect to happen?
Actual log messages from my MQTT topic are displayed, and not an infinite scroll of empty logs.
Did this work before?
This is the first time I've tried the log panel with the MQTT data source.
How do we reproduce it?
Periodically send some kind of log message through MQTT, set up the MQTT datasource, create a log panel and select the log topic.
Is the bug inside a dashboard panel?
| Key | Value |
|--|--|
| Panel | logs @ 10.0.12 |
| Grafana | 10.4.0 (03f502a94d17f7dc4e6c34acdf8428aedd986e4c) // Open Source |
Panel debug snapshot dashboard
```json { "panels": [ { "datasource": { "type": "grafana", "uid": "grafana" }, "gridPos": { "h": 13, "w": 15, "x": 0, "y": 0 }, "id": 2, "options": { "showTime": true, "showLabels": false, "showCommonLabels": false, "wrapLogMessage": false, "prettifyLogMessage": false, "enableLogDetails": true, "dedupStrategy": "none", "sortOrder": "Descending" }, "pluginVersion": "10.0.12", "targets": [ { "refId": "A", "datasource": { "type": "grafana", "uid": "grafana" }, "queryType": "snapshot", "snapshot": [ { "schema": { "meta": { "typeVersion": [ 0, 0 ], "channel": "ds/e92d200a-67e3-4a4b-9f5d-f7612be011d8/500ms/logs/ferret" }, "fields": [ { "name": "Time", "type": "time", "config": {} }, { "name": "log", "type": "string", "config": {} }, { "name": "stream", "type": "string", "config": {} }, { "name": "time", "type": "string", "config": {} } ] }, "data": { "values": [ [ 1710854030807, 1710854031810, 1710854032813, 1710854033815, 1710854034819, 1710854035822, 1710854036823, 1710854037825, 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"Environment (with versions)?
Grafana: 10.4.0
OS: Linux Mint
Browser: Firefox
Grafana platform?
Docker
Datasource(s)?
MQTT datasource