[mrtg] Re: MRTG stops running

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Mon Apr 29 21:37:15 MEST 2002

Jason Frisvold wrote:

> ERROR: Cannot update /usr2/local/graphmon/Data/38300.14.rrd with
> '1019746493:1572495528:389840083' unknown consolidation function 'RRD'

That is *strange*.

> 38300.14.rrd is an rrd created by MRTG.  If I delete the file and
> re-run, it creates a new one and works fine.  But, it almost seems that
> at random times other files exhibit the same problem.  Has anyone
> encountered this?  Is there a fix?  Am I doing something wrong?

You should examine the RRD file.  Perhaps "rrdtool info" or "rrdtool tune"
will give you the desired info.  "rrdtool dump" would also be a good
candidate for debugging purposes.

It's probably a good idea to do this right now, save the results and
keep them until one of the files misteriously gets altered again.

Also you can then spot the changes in the headers and perhaps even use
those changes to roll them back.  This way you don't loose your data.

> I'm running MRTG 2.9.18 Pre7 (soon to be Pre8) on a Redhat 6.2 system.

Next time also report the RRDtool version, in case it makes a difference.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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