NFSD not starting, threads problem

[kacer]

Hello guys,
I have this problem:
After one power outage, I'm not able to start nfsd.
Part of log:
Nov 08 23:51:27 [rpc.statd] Version 1.2.3 starting
Nov 08 23:51:27 [rpc.statd] Flags: TI-RPC
Nov 08 23:51:27 [rpc.statd] Running as root. chown /var/lib/nfs to choose different user
Nov 08 23:51:28 [rpc.mountd] Version 1.2.3 starting
Nov 08 23:51:28 [rpc.nfsd] error starting threads: errno 98 (Address already in use)
Nov 08 23:51:28 [kernel] [ 260.101843] lockd_up: makesock failed, error=-98
Nov 08 23:51:28 [kernel] [ 260.102036] nfsd: last server has exited, flushing export cache
Nov 08 23:51:28 [sm-notify] Version 1.2.3 starting
Nov 08 23:51:28 [/etc/init.d/nfs] ERROR: nfs failed to start

I have found possible reason with strace:
/proc/fs/nfsd/threads is locked as read-only immediately after start of rpcbind.
When I have tried to write something to this file, error message was the same.

I have tried the same situation on different computer, where NFS is working well and after start of rpcbind it's possible to write to:
/proc/fs/nfsd/threads

Restart doesn't help and I haven't been able to solve this problem using friends, google etc.
Can somebody please help me? Thank you

[krinn]

Make sure pipefs is mount and else if its directory exist (i know a bug where nfsd server never run nfs client won't create the directory)
You can check its status with

[kacer]

Hello krinn,
thank you for your reply.

Here is the result:
mount | grep rpc_pipefs
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

ls -la /var/lib/nfs/rpc_pipefs/
total 0
drwxr-xr-x 9 root root 0 Nov 9 00:47 .
drwxr-xr-x 7 root root 320 Nov 11 00:22 ..
dr-xr-xr-x 3 root root 0 Nov 9 00:47 cache
dr-xr-xr-x 2 root root 0 Nov 9 00:47 lockd
dr-xr-xr-x 2 root root 0 Nov 9 00:47 mount
dr-xr-xr-x 5 root root 0 Nov 11 01:14 nfs
dr-xr-xr-x 2 root root 0 Nov 9 00:47 nfsd4_cb
dr-xr-xr-x 2 root root 0 Nov 9 00:47 portmap
dr-xr-xr-x 2 root root 0 Nov 9 00:47 statd

Whan can I assume from this?

[Hu]

What versions of the various programs are you using on the affected and working systems?

[kacer]

Here is emerge --info: