Otdfbt

I'm getting the following error on an oracle database.

ORA-27086: unable to lock file - already in use

It tries to lock a file that resides in an NFS mount.

The NFS is on a loopback setup (long story short, I need it this way because of direct nfs) and I traced the error to nlockmgr not going up, even when I restart nfs, nfslock and rpcbind.

Does anybody knows how to get nlockmgr up again?

p08[oracle] () /$ cat /etc/issue
Red Hat Enterprise Linux Server release 6.5 (Santiago)

Here's the exit for rpcinfo -s:

[root@p08 init.d]# rpcinfo -s
 program version(s) netid(s) service owner
 100000 2,3,4 local,udp,tcp,udp6,tcp6 portmapper superuser
 100011 2,1 tcp,udp rquotad superuser
 100005 3,2,1 tcp6,udp6,tcp,udp mountd superuser
 100003 4,3,2 udp6,tcp6,udp,tcp nfs superuser
 100227 3,2 udp6,tcp6,udp,tcp nfs_acl superuser
 100024 1 tcp6,udp6,tcp,udp status 29

EDIT:

I found a script executed by the sysadmin after every reboot. After the reboot, nlockmgr is running. After executing this script, it vanishes from rpc.

service xinetd stop
service rpcbind stop
service nfslock stop
service nfs stop
service xinetd start
service rpcbind start
service nfslock start
service nfs start

Check your logs for messages containing locking. If there are problems setting up logging, then it should should be locked.

Is statd running? It is needed for locking to work on NFS versions before 4.

Alternatively, you may try mounting with the option for local lock management. This is not recommended if you have remote clients for the file systems.