Date: Thu, 1 Jun 2006 21:06:29 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Mark Morley <mark@islandnet.com> Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org Subject: Re: NFS processes locking up!! Message-ID: <20060602010629.GC40143@xor.obsecurity.org> In-Reply-To: <447f640d-11663@helpdesk.islandnet.com> References: <447f640d-11663@helpdesk.islandnet.com>
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[-- Attachment #1 --] On Thu, Jun 01, 2006 at 03:02:53PM -0700, Mark Morley wrote: > Hi all, > > We have an NFS server (amd64) running FreeBSD 6.1-STABLE. It serves a dozen > or so clients which are a mix of FreeBSD 4.11 and 6.1-STABLE. All NFS traffic > is on a dedicated gigabit switched network. > > Periodically we have a problem where it will stop serving up files. Running 'ps' > on the server shows a number of processes stuck in the 'D' state -- "a process in > disk (or other short term, uninter-ruptible) wait". > > Usually this includes all the nfsd processes as well as any others that are trying > to access the same disk drive. Any commands issued like 'du', 'sync', etc. go into > the same state and never exit. It is impossible to kill any of these processes. > > We can pretty much force this to happen by running a large 'find' or something > similar on the exported file system, although it will happen itself eventually > without any such commands being run. > > Our only option (as far as we can tell) is to reboot the server, which results in > a very long fsck period (it's over a terrabyte of disk space). > > This doesn't seem to be a hardware issue. This is a brand new server in all respects > (all new hardware, new RAID) and we saw the exact same issue on the machine that it > replaced (which was running 4.11 on i386). > > Any thoughts on this? Any more info I should provide? Please post your kernel config. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEf48VWry0BWjoQKURAmu+AKCnMNtnpRH8lhGPN/k8i4XTS3XS+QCfYYwn IzCpbIuBLLXjJkN0W1siSoU= =F4d3 -----END PGP SIGNATURE-----
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