Great Circle Associates Majordomo-Users
(February 1997)
 

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Subject: Re: Majordomo zeroing out lists
From: Tom Glover <tomg @ boiled . egg . com>
Date: Sat, 8 Feb 1997 18:31:37 -0800 (PST)
To: majordomo-users @ greatcircle . com
Cc: Jason L Tibbitts III <tibbs @ hpc . uh . edu>


If anyone questions the version of 1.94. It says that because I
changed it in the source. This is MJ 1.94.1 running on BSDI 2.1 with *no*
NFS.

In case you need more info here is a piece of /tmp/majordomo.debug. There
are lots of entries like this:

mj_majordomo: WARNING
shlock failed: write('/usr/local/majordomo-1.94/shlock.21193', '21193'):
Bad file des
criptor
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440.
mj_majordomo: WARNING
shlock: open('/usr/local/mail/lists/list.config.LOCK'): No such file
or directory
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
Can't fork at /usr/local/majordomo-1.94/majordomo.pl line 440, <STDIN>
chunk 1.
mj_majordomo: WARNING
shlock: open('/usr/local/mail/lists/list.config.LOCK'): No such file
or directory
mj_majordomo: WARNING
shlock: open('/usr/local/mail/lists/L.list'): No such file or
directory



On 7 Feb 1997, Jason L Tibbitts III wrote:

> >>>>> "TG" == Tom Glover <tomg@boiled.egg.com> writes:
> 
> TG> I'm not so sure that its plugged. One of my larger lists got its
> TG> subscriber list zeroed last week following some race conditions.
> 
> Could you describe these race conditions?  When testing 1.94.1 before its
> release, I ran it through the torturous task of processing 10000
> simultaneous subscriptions _and_ 10000 simultaneous unsubscriptions on a
> list that already had 20000 members.  This drove load averages through the
> roof (100+) and took a really long time to get through everything but at
> the end the list was essentially as expected.  There were a few lock
> timeouts and such but the list was not zeroed.
> 
> Of course that's not a scientific test and it only proves that the locking
> for subscriptions and unsubscriptions is at least pretty good on my
> platform.  If there really is a locking bug I'd really like to find the
> root of it.
> 
>  - J<
> 

--
Regards,
Tom
  ________________________________________________________________________
 |   "The Egg Domain"    |       "And all you touch and all you see,      | 
 |    tomg@egg.com       |          is all your life will ever be."       |
 | http://www.egg.com/   |                               (Pink Floyd)     |




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