Here are a couple of cases from the prometheus test suite which show bad metrics that give exactly the error you see:
https://github.com/prometheus/prometheus/blob/v2.36.2/model/textparse/promparse_test.go#L220-L223 https://github.com/prometheus/prometheus/blob/v2.36.2/model/textparse/promparse_test.go#L264-L267 A metric name with no value is one of those, so your NULL theory looks likely to be correct. You could try returning "NaN" for null values. "promtool check metrics" gives a different error: # echo "a" | /opt/prometheus/promtool check metrics error while linting: text format parsing error in line 1: expected float as value, got "" On Tuesday, 21 June 2022 at 11:47:25 UTC+1 [email protected] wrote: > Thanks Brian for your reply... > I see no error on collector log or on prometheus log... > only from the TARGET (error) page on Prometheus. > > I got 7 SQL endpoint.. and I isolate the one with the err. > I see directly from the DB query that 2 row have NULL values? > Could be this? > Now I try with a REPLACE NULL value directly on the query.... but your > advise... "If you save the scrape output, you can validate it with > "promtool check metrics", it's a good point of view. > > I'll be back > Thanks, ALEN > > Il giorno martedì 21 giugno 2022 alle 11:47:23 UTC+2 Brian Candler ha > scritto: > >> Where *exactly* do you see that error? >> >> What do you see if you scrape your collector directly using curl? >> >> If you save the scrape output, you can validate it with "promtool check >> metrics" >> >> On Tuesday, 21 June 2022 at 10:14:24 UTC+1 [email protected] wrote: >> >>> Hi all, I got this strange error... >>> I don't see any error on my collector (it run from 6 month). >>> I've just downloaded on my docker app, last version of Prometheus... >>> but it's the same. >>> >>> The strange think is that my metric page give me output of data.. >>> So I'm a little bit confused... could be a collector error? Or a >>> prometheus internal err? >>> >>> >>> - expected value after metric, got "MNAME" >>> >>> THANKS; Alen >>> >> -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/72392679-20c0-43dc-b9df-6f69f0e1eda3n%40googlegroups.com.
