[Ocfs2-users] "nfsd: non-standard errno: -512"

[Dmitry Rybin]

CentoOS 5.3, 2.6.18-164.el5.

ocfs2-tools-1.4.3-1.el5
ocfs2-2.6.18-164.el5-1.4.4-1.el5

I have NFS Sharing ocfs2 volume over NFS3, and sometimes NFS server
stop with error:
"nfsd: non-standard errno: -512"

Oct 12 17:01:22 piano nfsd[9885]: nfssvc: Setting version failed:
errno 16 (Device or resource busy)
Oct 12 17:01:22 piano nfsd[9885]: nfssvc: unable to bind UPD socket:
errno 98 (Address already in use)
Oct 12 17:01:24 piano nfsd[9961]: nfssvc: Setting version failed:
errno 16 (Device or resource busy)
Oct 12 17:01:24 piano nfsd[9961]: nfssvc: unable to bind UPD socket:
errno 98 (Address already in use)
Oct 12 17:01:34 piano kernel: nfsd: non-standard errno: -512
Oct 12 17:01:42 piano kernel: nfsd: non-standard errno: -512
Oct 12 17:01:42 piano kernel: nfsd: last server has exited
Oct 12 17:01:42 piano kernel: nfsd: unexporting all filesystems
Oct 12 17:01:42 piano kernel: KERNEL: assertion
(!sk->sk_forward_alloc) failed at net/ipv4/af_inet.c (152)
Oct 12 17:01:49 piano kernel: NFSD: Using /var/lib/nfs/v4recovery as
the NFSv4 state recovery directory
Oct 12 17:01:49 piano kernel: NFSD: starting 90-second grace period
Oct 12 17:07:09 piano mountd[10104]: Caught signal 15, un-registering
and exiting.
Oct 12 17:07:22 piano kernel: nfsd: non-standard errno: -512
Oct 12 17:07:42 piano last message repeated 9 times

NFSD - CPU 100%
o2net - CPU 100%
System can't reboot, stop on umount ocfs2.

Same problem here
http://www.mail-archive.com/ocfs2-users@oss.oracle.com/msg03000.html