[rrd-users] only "nan" values :-(

[jehan procaccia]

hello,

I just upgraded to redhat 8.0 having the following rpms
rrdtool-1.0.39-1.8.0
mrtg-2.9.17-8
net-snmp-5.0.6-8.80.2
net-snmp-utils-5.0.6-8.80.2

$ rrdtool fetch load15.rrd AVERAGE | more
                      ds0           ds1

1042399200: nan nan
1042399500: nan nan
1042399800: nan nan


however snmpget , gets the value !
$ snmpget -c public -v 1 localhost .1.3.6.1.4.1.2021.10.1.5.3
UCD-SNMP-MIB::laLoadInt.3 = INTEGER: 16

but here I suspect a  problem of output format, maybe rrdtools or mrtg 
don't like all this verbose information : UCD-SNMP-MIB::laLoadInt.3 = 
INTEGER: 16, but prefer something like only "16" ?

I found an output option that retrieve the value the way it used to be  
before the upgrade (redhat 7.1)
$ snmpget -c public -v 1 localhost .1.3.6.1.4.1.2021.10.1.5.3 -Oqu
enterprises.ucdavis.laTable.laEntry.laLoadInt.3 16

But I might be wrong, and the problem reside somewhere else ?!. Anyway 
it doesn't work, graphs are empty with values of "nan" in the text area .

Here's my mtrg.cfg file for that target

Target[load15]: 
.1.3.6.1.4.1.2021.10.1.5.3&.1.3.6.1.4.1.2021.10.1.5.3:public at localhost
Directory[load15]: corbeau
MaxBytes[load15]: 100
AbsMax[load15]: 110
Title[load15]: Linux Load Average (15 min)
PageTop[load15]: Linux Load Average (15 min)
YLegend[load15]: load
ShortLegend[load15]: load
Legend1[load15]: Load Average (15 min)
LegendI[load15]: Load Average (15 min)
Options[load15]: growright, integer, gauge, noinfo, nopercent

Pease let me know if you have an idea.

Thanks.


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