Duplicate emails - same smtp id processed by different MS processes.

[Quentin Campbell]

The situation appears even more confused.

I also have to specify "Lock Type = posix" to stop the duplication on
our Red Hat Enterprise Linux AS release 3 (Taroon Update 1) but it is
running with its own Sendmail 8.12.10.

Quentin
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>-----Original Message-----
>From: MailScanner mailing list 
>[mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Alan Dobkin
>Sent: 09 December 2004 16:50
>To: MAILSCANNER at JISCMAIL.AC.UK
>Subject: Re: Duplicate emails - same smtp id processed by 
>different MS processes.
>
>On 12/7/2004 12:34 PM, Julian Field wrote:
>> With sendmail-8.13 on Linux systems, you need to set
> > "Lock Type = posix" in MailScanner.conf.
>
>FWIW, I upgraded my server from Fedora Core 2 to Fedora Core 3
>and around the same time upgraded MailScanner to version 4.36.1-1.
>Fedora Core 3 included sendmail 8.13 (previously 8.12 in Core 2),
>and I didn't realize that the locking method had changed.  Around
>the same time, the MailScanner.conf file, which used to default
>to "Lock Type = flock" was changed to just "Lock Type = " (blank),
>so I suspected MailScanner may be causing the problem, but making
>the change to "Lock Type = posix" seems to do the trick.
>
>In retrospect, I now see that the sendmail release notes warned
>about this change over 2 years ago, back in release 8.12.5:
>
>8.12.5/8.12.5   2002/06/25
>           NOTE: Linux appears to have broken flock() again.  Unless
>                 the bug is fixed before sendmail 8.13 is shipped,
>                 8.13 will change the default locking method to
>                 fcntl() for Linux kernel 2.4 and later.  You may
>                 want to do this in 8.12 by compiling with
>                 -DHASFLOCK=0.  Be sure to update other sendmail
>                 related programs to match locking techniques.
>
>So, this begs the question, why not set "Lock Type = fcntl" instead
>of posix in MailScanner?  Does it not understand this method?
>
>Thanks,
>Alan
>
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