On Serveur2 with Prometheus 2.23 or 2.27.1
I run a query against a metric with a calculation (any will do that apply
to a vector, like rate, avg_over_time, etc.) In he following example I use
rate.
rate(ifHCInMulticastPkts{host="HOSTNAME",ifName="ha2"}[2m])
Rate should return a constant 0.5 every minute, but returns the following:
1624870560000, 0.5
1624870620000, 0.5
1624870680000, 0.5
1624870740000, null
1624870800000, null
1624870860000, null
1624870920000, 1.5037673189544352
1624870980000, 0.5
The raw data is present. If I collect the same data using another
prometheus serveur running 2.27.1 on a different machine, the data is
collected and displayed correctly both raw data and with a vector
calculation.
This behaviour applies to all the metrics collected from the same device
and other devices, but not all other devices.
- No errors in the logs
- Does not seem to be related to reloads or restarts
- Changing the step, time range doesnt change anything.
I am not sure what I should be looking at to troubleshoot.
Thank you for your help.
xkilian
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