[rrd-users] MRTG failing to write/poll data when using LogFormat: rrdtool

[IT - Sven Mueller]

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Hi.

Following up on a mail by "Thoenen, Peter Mr. EPS" 
<Peter.Thoenen at bondsteel2.areur.army.mil> (which was sent to this list before 
I subscribed today):

> Below is my mrtg.cfg and the rrd database .... tried use rrtool fetch on the
> database and not even sure anything is even being logged. (for example
> 1031702400: -1.#IND000000e+000 -1.#IND000000e+000 .... looks to me both DS0
> and DS1 counters are ZERO ).

Well, I have a very similar problem: MRTG stopped writing to the rrd database 
files.

After enabling the relevant debugging info in MRTG, This is what MRTG says 
about updating the RRD:

- --log: Called: RRDs::tune(/var/www/mrtg/logs/admin-2/admin-2_1.rrd -a ds0:55\
                                      -a ds1:55 -d ds0:GAUGE -d ds1:GAUGE)
- --log: Called: RRDs::update(/var/www/mrtg/logs/admin-2/admin-2_1.rrd,
                                     '1031909063:31.50:29.61')
- --log: Called: RRDs::last()
- --log: Called: RRDs::fetch(/var/www/mrtg/logs/admin-2/admin-2_1.rrd, 
                                    'AVERAGE','-s',1031909063,'-e',1031909063)
- --log:   got: /

Note that obviously, rrdtool/rrdupdate did _not_ return an error, or if it 
did, mrtg did not receive that. Does anyone have any Idea what might be 
happening there? 
Note that this is obviously _not_ a privileges issue since the update succeeds 
once in a while, and it is always updating the "last updated" value, it just 
stores NaN instead of the right value mostly.
Does anybody know how to fix this problem?

Regards,

Sven Müller
- - IT - Network&Infrastructure -

- -- 
* Heinrich Berndes Haushaltstechnik GmbH & Co KG
* Wiebelsheidestrasse 55, 59757 Arnsberg, Germany
* Phone: +49 2932 475-282 / FAX: -325
* http://www.berndes.com
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