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List:       freebsd-hackers
Subject:    (no subject)
From:       <rhfb () akira ! stdio ! com>
Date:       2010-07-29 9:57:49
Message-ID: 20100729094046.AD3F3C2 () akira ! stdio ! com
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I have a similar problem.

I have a NFS server (8.0 upgraded a couple times since Feb 2010) that locks up
and requires a reboot.

The clients are busy vm's from VMWare ESXi using the NFS server for vmdk virtual
disk storage.

The ESXi reports nfs server inactive and all the vm's post disk write errors when
trying to write to their disk.

/etc/rc.d/nfsd restart fails to work (it can not kill the nfsd process)

The nfsd process runs at 100% cpu at rc_lo state in top.

reboot is the only fix.

It has only happened under two circumstances.
1) Installation of a VM using Windows 2008.
2) Migrating 16 million mail messages from a physical server to a VM running FreeBSD \
with ZFS file system as a VM on the ESXi box that uses NFS to store the VM's ZFS \
disk.

The NFS server uses ZFS also.
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