[Mailman-Developers] Multi-slice qrunners to be fixed for 2.1.6? (Re: SF Patch 1008983)

Tokio Kikuchi tkikuchi at is.kochi-u.ac.jp
Fri Oct 22 02:19:29 CEST 2004

So, you back up. That's I wanted to hear.

Dallas Bethune wrote:

> On Oct 21, 2004, at 4:37 PM, Tokio Kikuchi wrote:
>> Brian Greenberg wrote:
>>> It should have a fairly high priority, as it will
>>> result in any qrunner class with multiple slices failing completely in
>>> a short amount of time (hours to a few days, depending on the amount
>>> of traffic and number of slices).
>> I really don't understand why the multiple feature is needed for mail
>> delivery as multi-threading may be handled by MTA. It was left there
>> because I am not in a position to test or qualify your patch
>> immediately. If there is anyone who can backup this patch, I will be
>> ready to merge in CVS.
> The MTA cannot perform multithreading between multiple lists.  For 
> instance, if there is one list with 10,000 subscribers no other 
> deliveries can be made while the emails to those 10,000 people are being 
> transferred to the MTA.  In some cases that may delay all other list 
> delivery by several minutes and if that happens many times a day it can 
> become problematic to end users.  Having multiple outgoing qrunners 
> allows other list mail to be delivered simultaneously.
> I have also seen the bug this patch addresses happen.  I saw one of the 
> outgoing qrunner processes die within about 15 minutes of restarting 
> mailman to have 4 of them.  They continued to die (and be restarted by 
> the master) for the next several hours.  Once I applied the patch, the 
> errors stopped.
> I have not done any sort of extensive testing, but it has been working 
> as expected for the past 3 days with the 3000 or so lists we have 
> running on the machine.
>     Dallas
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Tokio Kikuchi, tkikuchi@ is.kochi-u.ac.jp

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