[Xymon] rrd file will not recreate

[Root, Paul T]

Yeah, that was a good idea. But it wasn’t there.

I’ll keep looking.


From: Jeremy Laidman <jeremy at laidman.org>
Sent: Thursday, April 19, 2018 7:16 PM
To: Root, Paul T <Paul.Root at CenturyLink.com>
Cc: xymon at xymon.com
Subject: Re: [Xymon] rrd file will not recreate

Try using this magic incantation of lsof:

sudo lsof -nP +L1

This will list all filenames that have been deleted but have filehandles still being held open by a process. The "+L1" means to show all files with a link count less than 1. Deleted files have a link count of zero.

However, I suspect this cannot be your problem, because a new xymond_rrd process would simply create a new file with the same filename. A deleted-but-still-present file has no filename on the filesystem and so cannot block the creation of a new file with the same name.

Cheers
Jeremy


On 19 April 2018 at 04:32, Root, Paul T <Paul.Root at centurylink.com<mailto:Paul.Root at centurylink.com>> wrote:
Hi all,
                I’m writing a custom script to monitor a group of run away java scripts memory hog.

                Anyway, I’m trying to create a graph, which I’m never good at.

                Anyway, the rrd file was created immediately, when I first put in the entry to TEST2RRD and a NCV_Testname line in xymonserver.cfg.

                A couple of iterations of the data,  changing names etc. I deleted the rrd file (which was updating some data), killed the rrd processes to the xymon server. It didn’t recreate the file. So I restarted xymon completely on the server.

                All I could think of is a process holding on to that old file.

                So does anyone know the magic to get an RRD file to recreate on the server?

                BTW, a second server that also has the test, does have the rrd file, and it updates the current data, but no historical data.

Thanks
Paul.

Paul Root
Lead Engineer
390 Commerce Dr
Woodbury, Mn 55125
651-312-5207
paul.root at centurylink.com<mailto:paul.root at centurylink.com>

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