No value from time to time

[kevXZY]

I'm submitting a ...

• [*] Bug report
• Feature requestdd
• Question / Support request

Software Versions

Grafana	Zabbix	Grafana-Zabbix Plugin
4.4.1	3.2.6	3.5.1

What did you do?

We created a zabbix dashboard on grafana. From time to time we get no value or N/A on text field that are items pulled every 1 sec in zabbix.

I couldn't find any errors in grafana/zabbix logs.
Please advise.

Thank you for your help

[alexanderzobnin]

Can you check zabbix response in browser dev tools? What does zabbix return?

[sesom42]

I have very often the same error. I have created a playlist with many dashboards. After a run, almost all dashboards have missing values or they are completely empty. Can somewhere a debug output of the Zabbix plugins set?

[alexanderzobnin]

@sesom42 did you notice errors, for example, "Zabbix API Error" in grafana? This may be caused by php limits on Zabbix server.

[sesom42]

@alexanderzobnin no API error messages are displayed. The server is dimensioned to suit PHP needs. I've looked at it more closely. Grafana first requests '/api/dashboards/db/'. Then it retrieves for every widget '/api/datasources/proxy/2'. The answer to this request is sometimes only '{"jsonrpc": "2.0", "result": [], "id": 1}'. Sometimes '/api/datasources/proxy/2' is not even requested. It looks like more as an bug in Grafana itself.

[alexanderzobnin]

@sesom42 yes, you should check history/trend api queries. Some requests are cached (items, hosts, but not history).

[David-SpreenICT]

Hello everybody,

@alexanderzobnin Excuse me to re-fire this old thread but it's the only threat I find regarding the issue.

Has anybody found a solution to the rather high ammount of "no value" or "N/A" results in the grafana dashboard?

I have the same issue as @sesom42 and even in higher versions (currently using Grafana 5.3.4)
Can anybody give me some more information to create a more stable dashboard?

Thank you in advance

[kevXZY]

Hello

Sorry for not following back on this issue.. I must have forgotten.

I think that the issue originated from the browser. @David-SpreenICT , try to add the zabbix api url into exceptions, deactivate any adblocker etc... Verify that Grafana can connect without restrictions to Zabbix's API URL (FW rules etc...)

[David-SpreenICT]

Hello Neomh,

The "No Value" shows up on just a couple of the gauge's.
When the CPU gauge (for example) shows a nice value, the memory could go in to "No value" and after a 15 seconds refresh both could work fine... Then for about 4 of 5 refreshes the CPU gauge could go in to "No value" and the following refresh (15 seconds) will show a value again.

There is no add-blocker active, this would mess up all of the gauges and grafana has data so no FW issue's.

My collegue and I are thinking it should have something to do with the refresh time of the pages / gauge's.

Could you guy's give me an example of your refresh timers or the settings of your "Override relative time" for each gauge?

Many thanks for the effords,
Sincerely, David

[David-SpreenICT]

@neoMH

Sorry for the really late response, but I haven't had the time to research this more.
Today is the deadline I need to deliver the Grafana / Zabbix package, it will not fail of this issue but its more of cherry on top i'd like.

I have tested if the issue's persist with using a different browser (Firefox) and different machine's.
The "N/A" / "No Data" keep on showing up on every device with different browsers.

I have also tested what would happen if I enable Direct DB connection in the Zabbix Data source, but nothing really change's. The "N/A" keep showing up.

As you can see in the screenshot the following error was shown when I inspect the Dashboard in chrome

---

(4) metrics_panel_ctrl.ts:177 Panel data error: TypeError: Cannot read property 'name' of null
at eval (zabbixDBConnector.js:169)
at Qt (lodash.js:639)
at Function.Ka [as map] (lodash.js:9553)
at convertGrafanaTSResponse (zabbixDBConnector.js:168)
at ZabbixDBConnector.handleGrafanaTSResponse (zabbixDBConnector.js:127)
at eval (datasource.js:202)

---

Do you guy's have anymore bright idea's as what I can do to fix the N/A / No Value?
See below for more screenshots of how I set up this guage:

( The zabbix trigger is set to poll every 5 secons, as I want "Almost" realtime data is set the history to 5 seconds wich should work according to the grafana documentation.)

And as you can see, the screenshots before was of one dashboard with auto refresh off.
Below is a screenshot of the same dashboard after an automatic refres (15 sec)

[alexanderzobnin]

Hm... Try to upgrade to latest version, it seems that was fixed.

[alexanderzobnin]

Ah, sorry. That was fixed, but not released yet.
#571