I recently had the problem that an expdp command failed with the following message:
ORA-39001: invalid argument value ORA-39000: bad dump file specification ORA-31641: unable to create dump file "/backup/exp.dmp" ORA-27086: unable to lock file - already in use Linux-x86_64 Error: 37: No locks available Additional information: 9 Additional information: 37
The problem is related with that the NFS server which provides the NFS share. It has no locking service installed and/or configured. There are two options, you either install a locking service on the NFS server or change the mount options.
The option "noac" needs to be replaced with "nolock".
In my case I did the following change to /etc/fstab:
# Before
10.10.10.10:/Oracle /backup nfs rw,rsize=32768,wsize=32768,tcp,vers=3,hard,intr,noac 0 0 # After
10.10.10.10:/Oracle /backup nfs rw,rsize=32768,wsize=32768,tcp,vers=3,hard,intr,nolock 0 0
That's IT.