[Mailman-Users] Mailman sending duplicate msgs

Rene Churchill rene at vtwebwizard.com
Thu Aug 9 15:08:10 CEST 2001

Hi Amanda,

The last issue of the newsletter went out yesterday without
any problems, so I think setting QRUNNER_LOCK_LIFETIME did
the trick.  The subscriber base on this list is about 27,000
so Mailman can handle the list size.  I think it was my
original tweaks pushing for performance that caused this whole
mess to erupt.


At 03:32 PM 8/8/01, Amanda wrote:
>Rene Churchill wrote:
>> I've got a problem where mailman is sending duplicate email's
>> out to the list.  Obviously this is pissing off the list memebers.
>> My current theory as to why it's happening is that
>> QRUNNER_LOCK_LIFETIME was set too low.
>No kidding, it would piss me off too ... :-)
>We're currently still in development stages with our implementation of
>Mailman (such as it is) and haven't experienced this problem to date,
>but I've noticed a number of other people have been reporting and
>discussing this issue over the past few months. I haven't noticed a
>lot of definitive answers or information about this problem in
>particular, so I have some questions about its status.
>In particular I'm noticing it happen with people with very large
>(several hundred to several thousand) users. This is raising some red
>flags for me, as one of our current lists slated to be migrated to
>Mailman (if we ever get it functional) runs a permanent subscriber
>base of ~ twenty-nine thousand people. Now, it is an announce-only
>list, with a max of two messages a day... but they're a rather touchy
>lot, and mailbombing them with a couple dozen copies of a message is a
>sure way to get my cute little butt canned. So I have a vested
>interest in preventing this from occurring in our production
>Has it been reasonably established that the file lock is a/an/the
>cause of or contributor to this issue? Has anyone managed to
>successfully correct the problem? Anyone working on leads? Any
>proposed fixes in the future 2.1?

René Churchill                         rene at vtwebwizard.com
Vermont Web Wizard, LLC                802-244-5151
Specializing in Web Programming        802-244-5512 (fax)

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