NFS file lock hang

[Phil Dumont]

Recently moved our NFS homes from a CentOS 6 box to a FreeNAS 9.10 box.

After the move, rather a lot of stuff -- firefox, chrome, svn -- is failing because attempts to grab a file lock are just hanging. Specifically, fcntl(F_SETLK). Several different client OSes, all Linux distros -- all exhibit the same problem -- a couple CentOS major releases, Ubuntu.

I'm currently working around the problem by adding nolock to the NFS mount options. But of course, that means no cross-client locking, which could lead to trouble if more than one client tries to access the same file at the same time, so I'd like to fix NFS locking if I can.

The automount options for homes are: fstype=nfs,hard,intr,rsize=8192,wsize=8192,nosuid,nolock. The nolock option, as I said above, was just now added to avoid the lock hang. When it is removed, hangs happen.

I've attached the /etc/sysconfig/nfs from the prior, CentOS 6 NFS server, but it's very boring. All comments. Which I guess means it's running with all defaults. I believe the commented-out config lines tell you what those defaults are.

If there's anything else I can provide to help debug this problem, please let me know.

 

[maglin]

What are your system specs? What version of FreeNAS? Do you have portmap turned on?

 

[Phil Dumont]

What are your system specs?

http://www.45drives.com/pdf/SpecQ30-Base.pdf
Options: Rocket 750 Host bus adaptor, 8GB mem

What version of FreeNAS?

I think I mentioned it in the original post, but I'll repeat it here for your convenience: FreeNAS 9.10

Do you have portmap turned on?

Er, that's the same as rpcbind, right? It looks like I do:

storinator1# ps -J 0 -af | grep rpc
1639 - Is 0:00.27 /usr/sbin/rpcbind
1918 - Is 0:00.12 /usr/sbin/rpc.statd
14133 1 S+ 0:00.00 grep rpc
storinator1#

 

[Phil Dumont]

I think I mentioned it in the original post, but I'll repeat it here for your convenience: FreeNAS 9.10

More specific version info: FreeNAS-9.10-STABLE-201606072003 (696eba7)

 

[Phil Dumont]

One more data point...

I had said the attempt to lock hangs. Well, it doesn't hang indefinitely, it just takes a long time to return. When when it does, it's with an EIO failure (Input/output error).

 

[styno]

Just to be sure, you are exporting over nfsv3 and not nfsv4?

 

[Phil Dumont]

Affirmative. In the FreeNAS NFS service settings the "Enable NFSv4" checkbox is clear.