This rrd definition doesn’t actually use any rrds, which suggests the rrds don’t exist.

Adam.

From: observium <observium-bounces@observium.org> On Behalf Of McGregor, Kevin via observium
Sent: 20 October 2020 19:55
To: observium@observium.org
Cc: McGregor, Kevin <KMcGregor@winnipeg.ca>
Subject: [Observium] Error drawing graph (can not parse an empty rpn expression)

I just upgraded from 19.8 to 20.9 CE. In both I’ve been having the same problem: Everything works as expected, except two devices (of 19) produce a big pink box instead of a chart for the “Ports” widget on the Overview page for the devices. The chart is titled “Error Drawing Graph”. Other similar devices (same OS version, etc.) all show a normal-looking chart in the same place. The devices are “SunOS <hostname> 5.11 11.4.25.75.3 sun4v”. Most other devices of the same version work, just not two of them.

When I click on the chart, I get the Ports page and a bigger version of the same chart. Selecting “RRD Command” produces this below the pink box:

Description

Device total traffic in bits/sec.

Performance & Output

RRDTool Output: ERROR: can not parse an empty rpn expression

RRDtool Runtime: 0.011s | Total time: 0.012s

RRDTool Command

/usr/bin/rrdtool graph /tmp/DZSTkOrAZmZQeckq.png -g -Y --alt-autoscale --rigid --start 1603133061 --end 1603219461 --width 1152 --height 300 -c BACK#EEEEEE00 -c SHADEA#EEEEEE00 -c SHADEB#EEEEEE00 -c FONT#000000 -c CANVAS#FFFFFF00 -c GRID#a5a5a5 -c MGRID#FF9999 -c FRAME#5e5e5e -c ARROW#5e5e5e -R normal --font LEGEND:8:'DroidSansMono,DejaVuSansMono' --font AXIS:7:'DroidSansMono,DejaVuSansMono' --font-render-mode normal -E CDEF:inB= CDEF:outB= CDEF:octets=inB,outB,+ CDEF:doutB=outB,-1,* CDEF:inbits=inB,8,* CDEF:outbits=outB,8,* CDEF:bits=inbits,outbits,+ CDEF:doutbits=doutB,8,* VDEF:95thin=inbits,95,PERCENT VDEF:95thout=outbits,95,PERCENT CDEF:pout_tmp=doutbits,-1,* VDEF:dpout_tmp=pout_tmp,95,PERCENT CDEF:dpout_tmp2=doutbits,doutbits,-,dpout_tmp,-1,*,+ VDEF:d95thout=dpout_tmp2,FIRST VDEF:totin=inB,TOTAL VDEF:avein=inbits,AVERAGE VDEF:totout=outB,TOTAL VDEF:aveout=outbits,AVERAGE VDEF:tot=octets,TOTAL COMMENT:' \l' HRULE:999999999999999#FFFFFF:'Total Rx' GPRINT:inbits:LAST:%6.2lf%s GPRINT:inbits:AVERAGE:%6.2lf%s GPRINT:inbits:MIN:%6.2lf%s GPRINT:inbits:MAX:%6.2lf%s GPRINT:totin:%6.2lf%sB COMMENT:'\l' HRULE:999999999999999#FFFFFF:' Tx' GPRINT:outbits:LAST:%6.2lf%s GPRINT:outbits:AVERAGE:%6.2lf%s GPRINT:outbits:MIN:%6.2lf%s GPRINT:outbits:MAX:%6.2lf%s GPRINT:totout:%6.2lf%sB COMMENT:'\l' HRULE:999999999999999#FFFFFF:' Agg' GPRINT:bits:LAST:%6.2lf%s GPRINT:bits:AVERAGE:%6.2lf%s GPRINT:bits:MIN:%6.2lf%s GPRINT:bits:MAX:%6.2lf%s GPRINT:tot:%6.2lf%sB COMMENT:'\l' HRULE:0#999999

RRDTool Files Used

/opt/observium/rrd/<hostname>/port-2.rrd

/opt/observium/rrd/<hostname>/port-1.rrd

Would someone please give me a place to start looking for the problem?

Thanks!