On 17-12-2011 22:33, Tom Moore wrote:
After the upgrade from 4.3,0 to 4.3.7, I seem to be having a strange issue where I have 48 datapoints I am trying to create the rrd from. It was working fine before, but now when my client sends the data it gives this error
(names changed to protect the innocent)
2011-12-17 16:23:50 RRD error updating web.rrd from xx.xx.xx.xx: /usr/local/xymon/rrd/server.com/web.rrd: found extra data on update argument: 40:0:20:0:40:0:20:0:40:0:20:0:40:0:20:0
I can’t seem to tell if this is coming from rrdtool or xymon. Based on the rrdtool docs, there shouldn’t be any sort of limit to the number of arguments. I have another exact monitor, that is only sending 2 datapoints, and it is graphing fine. Just the 48 point one isn’t.
Is there a way I can see what xymon_rrd is doing?
enable debugging on xymond_rrd, either by re-starting it with the "--debug" option, or do a "kill -USR2 <xymond_rrd processid>"
When calling the rrd-update function, it will log a message like:
Flushing '/jorn.hswn.dk/memory.actual.rrd' with 1 updates pending, template 'realmempct'
This gets translated into a command
rrdtool update FILENAME -t TEMPLATE TIME1:VALUE1 <TIME2:VALUE2 ...>
In this case, TEMPLATE is 'realmempct' and there is "1 updates" - so there will only be one TIME:VALUE parameter.
Sending another USR2 signal turns off debugging.
It won't show the actual values, though, and I suspect that is where the problem stems from. This error usually means that there is a mismatch between the number of datasets listed in the template, and the actual number of data values present in the set of updates. Like if there were two memory-values in the update, but only one dataset- "realmempct" - listed in the template.
You can see the values in the error-message from the update, though. So comparing it to the template should be possible.
I am not sure, but another possibility is that the rrd file was created with a different number of datasets than what you are now trying to update it with. But I seem to recall that this would give another error.
Since web.rrd is a non-standard graph, I think you have a problem with the script generating these data.
Regards, Henrik