Great Circle Associates Majordomo-Users
(November 1994)
 

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Subject: Re: Duplicate Messages
From: Norm Aleks <naleks @ Library . UMMED . EDU>
Date: Fri, 18 Nov 1994 00:39:01 -0500 (EST)
To: Michael_Nelson <nelson @ seahunt . imat . com>
Cc: majordomo-users @ greatcircle . com
In-reply-to: <199411161551.HAA02097@seahunt.imat.com>

On Wed, 16 Nov 1994, Michael_Nelson wrote:
> My majordomo 1.92 system is really beginning to frustrate me and the users
> of the lists that I maintain.  It is sending out two or three copies of
> every message posted, and I have not been able to figure out what to change

Could it be that your Sendmail is re-processing the queue before the first
queue run is done?  I had a similar problem with a list of 200 people
(which takes about an hour to do the initial delivery run on).  My
Sendmail setup was to process the queue every *fifteen minutes* (yes, a
little excessive), so that before the initial delivery run was done, three
or four other Sendmail processes might be processing the same job that was
still running -- and people got the same message several times.

Two ways to fix this problem -- I would do both.  1) have Sendmail
checkpoint its delivery successes more often, so that even if two
processes *are* doing simultaneous delivery on a list, they are less
likely to step on each other's toes.  In Sendmail V8 it's config file OCn,
where n is the number of successes to checkpoint after.  2) Have Sendmail
process the queue less often -- say, every couple of hours. 

If you're not using Sendmail, never mind :-)

Norm


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