[Lustre-discuss] Crash and reboot accessing NFS exported Lustre filesystem.

[Phill Harvey-Smith]

Hi All,

We have one of our Lustre filesystems that we export via NFS to a 
machine that we don't currently have the Lustre client modules built for.

The remote machine can mount the filesystems however as soon as it tries 
to access a file on the NFS mounted filesystem, it causes the NFS server 
to crash and reboot.

The NFS server is Ubuntu 12.04LTS x86_64, kernel 3.8.0-27-generic, and 
Lustre version :

Lustre: Build Version: v2_4_90_0-g3917e62-CHANGED-3.8.0-27-generic

This was checked out from git yesterday, so is the newest 2.4 code.

The filesystems are exported as :

/home           192.168.0.0/24(rw,async,no_subtree_check)

On the target system I did the following :

mount test1:/home /mnt
ls /mnt

At this point it crashes the server, the relevant section of the 
crashlog as captured from the console is :

[  472.439409] LustreError: 
2131:0:(llite_internal.h:1175:ll_inode2fid()) ASSERTION( inode != ((void 
*)0) ) failed:
[  472.449660] LustreError: 
2131:0:(llite_internal.h:1175:ll_inode2fid()) LBUG
[  472.478560] Kernel panic - not syncing: LBUG

Does anyone know how I can fix this ?

Cheers.

Phill.