The .rrd files exist in the same directory as all of the other rrds for that host, and they have the same permissions as all of the others, and they are updated (as evidenced by the rrd file timestamp) every five minutes.
Is there a way to verify the rrd files in some way? Or just blow these two away and recreate them?
Kevin McGregor
From: Adam Armstrong adama@observium.org Sent: October 20, 2020 14:02 To: 'Observium' observium@observium.org Subject: Re: [Observium] Error drawing graph (can not parse an empty rpn expression)
This rrd definition doesn't actually use any rrds, which suggests the rrds don't exist.
Adam.
From: observium <observium-bounces@observium.orgmailto:observium-bounces@observium.org> On Behalf Of McGregor, Kevin via observium Sent: 20 October 2020 19:55 To: observium@observium.orgmailto:observium@observium.org Cc: McGregor, Kevin <KMcGregor@winnipeg.camailto: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!