Date: Mon, 17 Dec 2001 13:59:23 -0500 (EST) From: "Marius M. Rex" <marius@malkav.snowmoon.com> To: questions@FreeBSD.org Cc: stable@FreeBSD.org Subject: on/off NFS connection errors Message-ID: <20011217120545.D48149-100000@malkav.snowmoon.com>
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For a while I have been treating this as an annoyance, but I thought it would be wise to investigate if something larger and more nefarious might be being indicated by this. I have a mixed environment of mainly Linux boxen, with a dozen or so FreeBSD machines (For when we need the kind of network resources that raising the NMBCLUSTERS can offer.) Both types of systems serve mainly as webservers, serving content that ultimately comes off of exported NFS directories, from a Network Appliance (NetApp Release 5.3.4R3: Thu Jan 27 12:08:07 PST 2000) The Linux boxen don't complain at all, but the FreeBSD boxen can get rather noisy about NFS connection errors. It happens on and off like so: ><118>Dec 15 21:01:47 cc117 /kernel: nfs server netapp1:/vol/members: not >responding ><118>Dec 15 21:01:47 cc117 /kernel: nfs server netapp1:/vol/members: is >alive again ><6>nfs server netapp1:/vol/members: not responding ><6>nfs server netapp1:/vol/members: is alive again ><118>Dec 15 22:34:19 cc117 /kernel: nfs server netapp1:/vol/members: not >responding ><118>Dec 15 22:34:19 cc117 /kernel: nfs server netapp1:/vol/members: is >alive again ><6>nfs server netapp1:/vol/members: not responding ><6>nfs server netapp1:/vol/members: is alive again ><118>Dec 15 22:39:19 cc117 /kernel: nfs server netapp1:/vol/members: not >responding ><118>Dec 15 22:39:19 cc117 /kernel: nfs server netapp1:/vol/members: is >alive again ><6>nfs server netapp1:/vol/members: not responding ><6>nfs server netapp1:/vol/members: is alive again ><118>Dec 15 22:40:19 cc117 /kernel: nfs server netapp1:/vol/members: not >responding ><118>Dec 15 22:40:19 cc117 /kernel: nfs server netapp1:/vol/members: is >alive again One moment we are connected, another we are down, and the we are back up again. Some days I can get pages and pages of this, others very little. Luckily the connection error is so short lived that Apache never hiccups. Has anyone else seen these kinds of persistent NFS errors is the 4.x branch? (This didn't happen noticeably in 3.x, but I would still maintain that the NFS code in 4.x is an improvement over 3.x.) Can anyone suggest a sysctl/kernel variable I might tune to help remedy the problem? If the root of the problem is more likely on the Netapp side, I have a support contact and am not afraid to use it. Anyone have any advice or suggestions to offer? This is the platform that I am working on: FreeBSD cc117 4.2-STABLE FreeBSD 4.2-STABLE #0: Sat Aug 18 00:21:16 EDT 2001 root@cc117:/usr/src/sys/compile/CCI_KERNEL i386 ------------------------------------------------------------------------- Marius M. Rex Hardware: n. The parts of a computer that can be kicked. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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