Problem with hobbitd_rrd custom graph

[Davíð Steinn Geirsson <david (at) basis.is>]

Hi all,

I'm trying to create a custom graph for hobbit but am having some problems.

I have a script doing SNMP probing and returning status messages to 
hobbit. I have another script that generates RRD definitions for 
hobbitd_rrd.

I've added the script to hobbit_rrd extra_scripts:
[rrdstatus]
        ENVFILE /usr/lib/hobbit/server/etc/hobbitserver.cfg
        NEEDS hobbitd
        CMD hobbitd_channel --channel=status 
--log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --rrddir=$BBVAR/rr
d --extra-script=/usr/lib/hobbit/server/ext/sensatronics-grapher.py 
--extra-tests=temp --debug


I've also made a graph definition in hobbitgraph.cgi (not really the 
finished definition, but I think it should work for testing):
[temp]
        TITLE Sensatronics environment monitor
        YAXIS Measurement
        DEF:11=sensatronics.rrd:11:AVERAGE
        DEF:12=sensatronics.rrd:11:AVERAGE
        DEF:13=sensatronics.rrd:11:AVERAGE
        DEF:21=sensatronics.rrd:11:AVERAGE
        DEF:31=sensatronics.rrd:11:AVERAGE
        DEF:41=sensatronics.rrd:11:AVERAGE
        DEF:42=sensatronics.rrd:11:AVERAGE
        LINE2:11#00CCCC:value
        COMMENT:\n
        GPRINT:11:LAST: \: %5.1lf (cur)
        GPRINT:11:MAX: \: %5.1lf (max)
        GPRINT:11:MIN: \: %5.1lf (min)
        GPRINT:11:AVERAGE: \: %5.1lf (avg)\n


Now, the rrd file is created but only occasionally do I see values 
entered into it (I haven't seen a pattern - looking over the rrd 
generated over the weekend I see some values, sometimes 30 minutes 
apart, sometimes hours, but almost all the measurement points show NaN)

My script is being executed every 5 minutes.

Here is the output from rrd-status.log (with hobbitd_rrd run with 
--debug flag):
2008-09-29 14:03:37 Want msg 698, startpos 1151746, fillpos 1151746, 
endpos -1, usedbytes=0
, bufleft=425213
2008-09-29 14:03:38 hobbitd_rrd: Got message 698 
@@status#698/tankar_hiti|1222697018.325994
|10.200.10.3||tankar_hiti|temp|1222698818|green||green|1222263717|0||0||0|0
2008-09-29 14:03:38 startpos 1152334, fillpos 1152334, endpos -1
2008-09-29 14:03:38 -> do_external(tankar_hiti, temp)
2008-09-29 14:03:38 000021108 : Saving msg to file 
/usr/lib/hobbit/server/tmp/rrd_msg_21108
2008-09-29 14:03:38 <- do_external(tankar_hiti, temp)
2008-09-29 14:03:38 Want msg 699, startpos 1152334, fillpos 1152334, 
endpos -1, usedbytes=0
, bufleft=424625
2008-09-29 14:03:38 000021108 : Calling helper script 
/usr/lib/hobbit/server/ext/sensatroni
cs-grapher.py tankar_hiti temp /usr/lib/hobbit/server/tmp/rrd_msg_21108
2008-09-29 14:03:38 000021108 : Helper input 'DS:11:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:12:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:13:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:21:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:31:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:41:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'DS:42:GAUGE:600:0:U'
2008-09-29 14:03:38 000021108 : Helper input 'sensatronics.rrd'
2008-09-29 14:03:38 000021108 : Helper input '7:62:4:21:27:24:16'
2008-09-29 14:03:38 000021108 : Unlinking temp file
2008-09-29 14:03:38 get_hobbitd_message: Interrupted

The 'get_hobbitd_message: Interrupted' message always appears after 
accepting input from my script.

Any ideas?

Kind regards,

--
Davíð Steinn Geirsson
Basis ehf.
david (at) basis.is / (+354) 575-0419