[rrd-users] Strange behavior with rddtool update with crontab

[Andy Riebs]

Please send the `crontab -l` listing of the command that you are using, 
and the script you are invoking (unless you are invoking rrdtool 
directly from crontab); this might help to understand what's going on.

Andy

On Friday 24 October 2008, alix-r wrote:
> Hello.
>
> I'm facing a strange behavior with a Bash script executed by CRONTAB.
> The script works fine if I run it from the command line directly.
> However, if I try to run  it time controlled by CRONTAB , I'm getting
> the following error
> message:
>
> --1--
> ERROR: temps.rrd: expected 3 data source readings (got 3) from N
> 39.6875
> 23.125
>
> If I list the RRD-DB temps.rrd by
>
> rrdtool fetch temps.rrd AVERAGE --start N-1000 --end N<
>
> I can see that the organization  (just 2 values per entry) is
> correct.
>
>                        rob_raum           rob_hzvor
>
> 1224742800: nan nan
> 1224742860: nan nan
> 1224742920: 3.9680094819e+01 2.3062500000e+01
> 1224742980: 3.9695577221e+01 2.3062500000e+01
> 1224743040: 3.9577488868e+01 2.3062500000e+01
> 1224743100: 3.9222938007e+01 2.3062500000e+01
> 1224743160: 3.9664530825e+01 2.3062500000e+01
> 1224743220: nan nan
> 1224743280: nan nan
>
> Again, the script works correctly  executed via the command line. The
> valid values above are entered that way. By CRONTAB execution, I do
> not get entries due to the error.
>
> Any idea what's wrong ?
> (I'm new with RRDTOOLS and LINUX, hopefully the question is not
> stupid)
>
> Thanks
>
> alix-r
>
> --
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>ab-tp20145204p20145204.html Sent from the RRDTool - User mailing list
> archive at Nabble.com.
>
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-- 
Andy Riebs
(w) +1.978.748.0043    andy.riebs at hp.com
(h) andy at candooz.com
My opinions are not necessarily those of HP