check_email_loop.pl problem fixed

[Jo]

Dave Ewall wrote:

> I found an issue with the check_email_loop.pl script that I saw one or 
> two other people posting about a few months ago, so I thought I'd share.
>
> I was using it on my mail system for a while without problems, and 
> then I moved it to the new system that we set up, and it started to 
> show lost emails.  I searched the mailing lists, to no avail.
>
> The reason was that it was sending emails, and THEN checking for the 
> previous email sent.  The issue comes up where it removes all of the 
> emails while it's checking for the email that was sent by the previous 
> run.  This assumes that it takes longer for the email that was just 
> sent to get to its destination than it does for the script to then 
> check for previously sent emails.
>
> The fix is to send the email after the emails from the previous runs 
> are checked, and before you flush out the state file.
>
> I moved lines 104-116 to line 149 (in the version that was obtained by 
> nagios-plugins-1.4-beta1), and the problem went away.
>
> In the previous email system, we had two mail servers in front of the 
> final destination mail server, so it took a few seconds (at best) for 
> the email to propogate to its mailbox.  In the new system, there are 
> two mail servers (of the same priority) that are the final 
> destination... they didn't have to forward anything, and due to the 
> faster hardware, the email got into the mailboxes immedately... so by 
> sending the next email before checking for the previous emails, you 
> end up deleting the email for the next run during the current run.
>
> -Dave

Hi Dave,

That's great work. I believe I have been bitten by this bug too. Thanks 
for fixing it.

Jo


-------------------------------------------------------
SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
from IBM. Find simple to follow Roadmaps, straightforward articles,
informative Webcasts and more! Get everything you need to get up to
speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null