Hi Micah,
At 12:30 02-09-2009, Micah Anderson wrote:
>However, it actually is... as you can see from the process list below,
>the milter has not been stopped, and it has been running for days, the
>socket itself has the same date/timestamp as when the process was
>started. Perhaps internally the milter is not responding, or postfix has
>closed its internal connection to the milter?

I don't see "AutoRestart" or -A as a startup parameter.  As the 
socket timestamp has not changed, I'll conclude that the milter is 
not restarted automatically.  I'm not familiar with postfix internals 
on how the connection is handled in there.

>No it should not... and it has not for a long time, I think the newer
>versions have been very stable. However, if for some reason it *does*
>crash (e.g. an OOM condition is met, or a sloppy sysadmin, etc.), then
>these errors are generated, and we will know about it, as long as we
>aren't ignoring this message.

If the milter crashed, then it should not show up in the process 
list.  The alternative is that the milter is no longer responding.

>It does, in fact it is still running, with the same date/timestamps as
>the process entry I originally wrote this email about:
>
>srwxrwxr-x 1 dkim-filter dkim-filter 0 2009-08-21 22:45 
>/var/run/dkim-filter/dkim-filter.sock

You could switch to TCP sockets and sniff the connection to see 
whether there is any activity once the problem is detected.  The 
other alternative is to compile a debug version of the milter and get 
a backtrace from the core file after a crash.

According to your configuration, you are only using the milter for 
DKIM signing.  Identify the last message that was sent and whether it 
was DKIM signed.  The postfix error message should be after 
that.  Capture the message and use it see whether you can reproduce 
the problem.

Regards,
-sm 


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