*BSD News Article 83733


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From: Joel Moldenhauer <joelm@elite.net>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Wierd problem with Apache and NFS
Date: Wed, 27 Nov 1996 10:46:08 -0800
Organization: Elite Networking - Merced, CA
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I am running two web servers that host virtual domains.  One
of the servers has a disk mounted on /usr/local/www that holds
all the pages.  It is NFS shared to the other server.  The
other server also mounts the share onto /usr/local/www and
does its work from there.

Both machines are running 2.1.0-RELEASE and Apache 1.0.5

After what seems to be a random period of time, the server
running Apache from the NFS share suddenly begins spewing
'VM pager fault (I/O error) in pid xxx' messages.  I thought
maybe a local disk was going bad or something else was
happening until I actually saw it happen before my eyes.

When this happens, the network activity lights for the NFS
server and the NFS client instantly turn on solid.  If I kill
all the web server processes, the messages stop, the server
does not crash, and the lights turn off.  If I do not kill
off the server processes, the NFS client machine will crash
eventually, sometimes within seconds other times it took
hours.

If anyone has seen this before or has any suggestions as to
what would cause this kind of problem, please reply.

Jonathon
Elite.Net System Administrator