From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Thu Mar 03 2005 - 07:48:00 CST

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On Thu, Mar 03, 2005 at 12:48:06AM -0800, Michael Nguyen wrote:

> When this error happens, typically nothing is happening. It's just running
> quietly, throws the error, and continues to run quietly. No emails have
> been lost as far as I can tell. No connections were made around the time
> when the error is thrown.
>
> I'm stumped. ;-) What I want to know is....is this dangerous? Is it
> related to the idle-ness of the server? The two other Postfix servers that
> we have in production get consistent traffic and they never throw these
> errors.
>

Watchdog timeouts are often related OS bugs that break event-based I/O
by reporting that a file descriptor is ready when it is not. Postfix
will then block on an I/O operation until the watchdog alarm expires...

If the issue is infrequent, and you are willing to tolerate an occasional
blocked process, there is no harm, no mail is lost. On the other hand
I would look for a less buggy OS release or flavour if that is an option.

--
        Viktor.

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