From: Ralf Hildebrandt (no email)
Date: Fri Mar 01 2002 - 04:25:20 EST
On Thu, Feb 28, 2002 at 04:38:11PM -0800, Charles McColgan wrote:
> So I'm seeing the exact same thing right now on several on my postfix
> servers that use the content_filter that are sitting behind a layer 7 load
> balancer (Foundry ServerIron) in two of my data centers. It just started
> last night (about 2/28 9:00 GMT).
Who needs load balancers with SMTP servers? MX records are totally
sufficient.
> I start getting a bunch (near the maximum of 150) smtpd procs hung up and
> mail begins filling up the mailq. I have to restart postfix to get things in
> a happy state again.
smtpd processes? These are for incoming mail. Could it be that the LB
switches from one box to another and this keeps the connections to the
Postfix box hanging?
In any case, the smtpd processes should/will die after a timeout period.
> Up until mid last week, things have been working perfectly. On Thursday
> night, however, the farm was SYN flooded. Since then, the machines have
> been extremely unstable.
I'd suspect the switch. Has the switch been rebooted as well?
> Jan 15 14:26:19 kapow postfix/master[23031]: warning: process
> /net/postfix/libexec/trivial-rewrite pid 23029 killed by signal 11
trivial-rewrite dies. Which maps are used by trivial-rewrite ?
transport_maps is one of them. Increase verbosity for the
trivial-rewrite daemon in master.cf by adding a " -v"
> Now I'm not sure where the problem actually is, but since Postfix is the
> only program reporting errors, its all I have to go on.
Postfix is a very good tool to detect network problems.
> All the filesystems (ext2) have been scanned and have come up clean.
Consider ext3 for corporate servers.
-- Ralf Hildebrandt (Im Auftrag des Referat V A) Charite Campus Virchow-Klinikum Tel. +49 (0)30-450 570-155 Referat V A - Kommunikationsnetze - Fax. +49 (0)30-450 570-916 Failure is not an option. It comes bundled with your Microsoft product. - To unsubscribe, send mail to with content (not subject): unsubscribe postfix-users
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