Duplicate emails (STILL OCCURING) - same smtp id processed by different MS processes.

[Quentin Campbell]

Julian

I am _still_ seeing some duplicate processing by MailScanner when I set
"Lock Type = posix" although not as many as when I let "Lock Type"
default.

The setup is:

Red Hat Enterprise Linux AS release 3 (Taroon Update 1) 
  - its own Sendmail 8.12.10
  - have not applied most recent kernel updates
   
MailScanner-4.35.11-1
  - with a more recent Message.pm 

MailScanner.conf
  - Lock Type = posix

 
Quentin 
---
PHONE: +44 191 222 8209    Information Systems and Services (ISS),
                           University of Newcastle,
                           Newcastle upon Tyne,
FAX:   +44 191 222 8765    United Kingdom, NE1 7RU.
------------------------------------------------------------------------
"Any opinion expressed above is mine. The University can get its own."  

>-----Original Message-----
>From: MailScanner mailing list 
>[mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Quentin Campbell
>Sent: 13 December 2004 09:58
>To: MAILSCANNER at JISCMAIL.AC.UK
>Subject: Re: Duplicate emails - same smtp id processed by 
>different MS processes.
>
>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
>---
>PHONE: +44 191 222 8209    Information Systems and Services (ISS),
>                           University of Newcastle,
>                           Newcastle upon Tyne,
>FAX:   +44 191 222 8765    United Kingdom, NE1 7RU.
>---------------------------------------------------------------
>---------
>"Any opinion expressed above is mine. The University can get 
>its own."  
>
>>-----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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