file lock fails on nfs file system

[Satya_6]

Hi,

The file locking (using lockf as well as fcntl) fails on a file (always returns -1 on a nfs filesystem). The 'errno' is set to ENOLCK.
This happens only on HP.

any help would be greatly appreciated

TIA
satya

[Massimo Bianchi]

Hi,
check if on the server the rpc.lockd is active.

HTH,
Massimo

[Jean-Louis Phelix]

Hi,

I think that you can find the answer in man lockf.

See the NFS section :

"Only advisory record locking is implemented for NFS files"

and in the ERRORS :

[ENOLCK] Either function is F_TLOCK or F_LOCK and the file is an NFS file with access bits set for enforcement mode, or the file is an NFS file and a system error occurred on the remote node.

Regards.

[Enrico P.]

Hi,
from manual:

If multiple users on different NFS clients will be writing to the file,
you must also turn off attribute caching on those clients by mounting
the file with the noac option.

Issue the following command on the NFS client to make sure the
server is running all the NFS server processes:

/usr/bin/rpcinfo -p servername
The rpcinfo command should display the following processes:
??? rpcbind
??? nfs
??? mountd
??? status
??? nlockmgr
??? llockmgr

Enrico