Problem with log rotation

[Henry Swanepoel]

> I have some problems with the log rotation option of Nagios. At the
moment, I'm
> using weekly log rotation (but the same problem also occured with daily
> rotation). When log rotation takes place two files are created in the
archive
> directory: 

*snip*

> Most events are included in the nagios-03-22-2003-23.log (e.g.
> nagios-03-23-2003-00.log just contains "[1048373973] LOG ROTATION:
WEEKLY").
> The cgi-scripts (like history.cgi) are looking for archived log files
> ending with -00.log, therefore not all messages are displayed in the web
> interface. What has to be done in order to get Nagios to display all
messages
> related to a log period? 

*snip*

I've run into the same problem.  To fix the reporting, I simply renamed the
relevant 'full' log file to end with a -00.log, which fixed the reporting.
As
for the cause, I've come to the conclusion that some kind of race exists
that
causes the file to be rotated a fraction before midnight, hence the -23.log
ending, and again on or after midnight.  It would appear that the first
file's
handle then gets passed back, which explains why it get the data.

Exactly how I've not figured out yet, as I've not had much time to devote to
this, and in the 8 months we've been running Nagios, only 4 files have ended
up this way.  When I get some time, I plan to dig deeper into the mystery
that
is the source. ;)

FWIW  :)

-- 
Live long and Prosper

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Henry Swanepoel                       | Office: +27 11 529 1057
Internet Infrastructure Administrator | henrys AT discovery DOT co DOT za
Discovery Health (PTY) Ltd.           | 155 West Street, Sandton, 2146
Reg. #: 1997/13480/07                 | http://www.discoveryhealth.co.za/
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