NFS/Sendmail issue since upgrading to 4.9-STABLE

Adam Maloney adam at
Wed Nov 26 11:41:01 PST 2003

Just an update for anyone paying attention to this issue.

We are going to temporarily move the inbound Sendmail queue to be local
rather than NFS.  We'll run like this through the holiday weekend and see if
the problems we're having continue or not.  If they stop happening, then we
can be pretty confident that some change in the NFS client code is causing
this (the problems started when we upgraded the 1st client, before making
any changes to the server).

We've also noticed another problem that we believe to be NFS related as well
with these same machines.  It started happening at exactly the same time
(though less frequently).  This 2nd issue is in a custom application that we
are running.  At this time I don't have a lot of detail, but we are fairly
confident that it is also NFS related.  Making the inbound Sendmail queues
local will also isolate this to be NFS or not.

I will report back on Monday with our results.

I appreciate everyone's input.

----- Original Message ----- 
From: "Adam Maloney" <adam at>
To: <freebsd-stable at>
Sent: Wednesday, November 26, 2003 8:16 AM
Subject: NFS/Sendmail issue since upgrading to 4.9-STABLE

> Hi all,
> I have 3 servers accepting mail, with sendmail in Queue-only mode dropping
> mail into an NFS queue (mounted from a 4th machine.)  All 4 machines
> involved are running FreeBSD.
> I upgraded the 3 NFS clients from 4.8 to 4.9-STABLE on Monday, and started
> seeing this sendmail message:
> Nov 26 06:51:29 unix20 sm-mta[48069]: (real-message-id): SYSERR(root):
> queueup: cannot create queue file ./qf(real-message-id), euid=0: Resource
> temporarily unavailable
> The df(message-id) file is created and appears to be complete, however the
> qf file is 0 bytes.
> This happens sporadically, a few times a day on each machine (together
> about 150,000 messages/day).
> I upgraded the NFS server from 4.8 to 4.9 yesterday, thinking that might
> help, but the problem is still there.
> Any ideas how to troubleshoot this one?
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