nfs broken after upgrade from 10.04 to 12.04

[scar]

Marius Gedminas @ 01/08/2014 06:22 AM:
> On Tue, Jan 07, 2014 at 11:44:25PM -0700, scar wrote:
>> i noticed i can't connect to the rpcbind on port
>> 111, maybe because it is only listening on the ipv6 interface?
> You might be right!  This is what I get when I run that command:
> 
> $ sudo netstat -tnlvp|grep 111
> tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      817/rpcbind     
> tcp6       0      0 :::111                  :::*                    LISTEN      817/rpcbind     

w00t i was right! :D  i restarted the service with 'sudo service portmap
restart' and now it is listening on the ipv4 interface and my client can
access the NFS shares finally!

not sure what the cause is though... will have to keep an eye on it when
the server reboots next