[Users] CT migration of ploop failed on nfs

[Tommy Tang]

hi all:
I'm trying the migration of ploop from node1 to node2
       the directory /vz/private of node1 is a local dirctory on node1. 
the directory /vz/private of node2 is a nfs which I mounted from node3


I started the CT with ploop on node1
I migrated the CT as:  vzmigrate -v --online -r no 192.168.5.159 1113

and I got the message as follow:

Starting online migration of CT 1113 to 192.168.5.159
OpenVZ is running...
   Loading /etc/vz/vz.conf and /etc/vz/conf/1113.conf files
   Check if ploop is supported on destination node
Next unused minor: 0
   Check IPs on destination node:
Preparing remote node
   Copying config file
1113.conf                                     100% 1761     1.7KB/s   00:00
No changes in CT configuration, not saving
   Creating remote container root dir
   Creating remote container private dir
Syncing private
Live migrating container...
   Copying top ploop delta with CT suspend
Sending /vz/private/1113/root.hdd/root.hdd
Setting up checkpoint...
        suspend...
        get context...
Checkpointing completed successfully
   Dumping container
Setting up checkpoint...
        join context..
        dump...
Checkpointing completed successfully
   Copying dumpfile
dump.1113                                     100% 3887KB   3.8MB/s   00:00
   Undumping container
Restoring container ...
Starting container ...
Error in do_lock (lock.c:71): Error in flock(/vz/private/1113/root.hdd/DiskDescriptor.xml.lck): Input/output error
Error in do_lock (lock.c:71): Error in flock(/vz/private/1113/root.hdd/DiskDescriptor.xml.lck): Input/output error
Failed to mount image: Error in do_lock (lock.c:71): Error in flock(/vz/private/1113/root.hdd/DiskDescriptor.xml.lck): Input/output error [23]
Error: Failed to undump container
Resuming...

Dose anyone know the problem? is it fixable or some wrong with my configuration?
BTW : is it possible to put the private of CT on the nfs?

Thanks!

Tommy
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