[Xymon] trimhistory error

Japheth Cleaver cleaver at terabithia.org
Wed Sep 23 20:39:46 CEST 2015

On 9/23/2015 8:03 AM, Dirk Kastens wrote:
> Hi,
> I'm running the trimhistory command every night to clean up the 
> logfiles from events that happend more than a year ago using the 
> following command:
> /bin/su - xymon -c '/usr/libexec/xymon/trimhistory --cutoff=`date +%s 
> --date="today -1 year"` --drop --droplogs 
> --env=/etc/xymon/xymonserver.cfg'
> Now I found out, that most of the files in the /var/lib/xymon/hist 
> directory are corrupted and that the history of these tests are not 
> displayed any longer on the web page. The first line of the files look 
> like this:
> Tue Jun 17 12:41:45 2014 green 1403001705Tue Jun 17 12:41:45 2014 
> green 1403001705 37051426
> I'm not sure, but I think that the trimhistory command is responsible 
> for that. Any ideas?
On 9/23/2015 8:07 AM, Dirk Kastens wrote:
> Oh, I'm using Xymon 4.3.20-1.el6.terabithia


I'm not aware of any specific issue with the trimhistory command. If you 
were following along with the test RPMs last year there was a bug in 
xymond_history that could sometimes cause this in 4.3.18-0.0.7464 that I 
believe was fixed by 4.3.18-0.0.7471. It may be a left-over line from 
around that time, if you were running that.

A quick fix is to re-split the lines on the datestamp so that the 
history CGI can read through it.
Something like (untested!): perl -pe 's/(\d+)([A-Z][a-z]))/\1\n\2/' 
<historyfile> might correct the display (and can be run recursively once 

If previously-OK history files are being clobbered by trimhistory going 
forward, that's definitely a problem. Do you think you might be able to 
gather a before/after file set in that case? It would definitely help 
with debugging.

Additionally, I'd recommend upgrading to RPM 4.3.21-4, though I don't 
believe there are any specific fixes that would affect this there.


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