[Lustre-discuss] Client hangs when reading from Lustre ...

[Andreas Dilger]

On Feb 04, 2008  13:54 -0800, Klaus Steden wrote:
> I'm trying to figure out something odd ... a node in my cluster hangs when I
> run 'df', or 'find -exec file {}' or other commands like that.
> 
> No other clients in the cluster exhibit the same behaviour. I'm seeing a lot
> of messages like this in its syslog:
> 
> -- cut --
> Feb  4 13:51:37 tiger-0-6 kernel: LustreError:
> 5827:0:(client.c:576:ptlrpc_check_status()) @@@ type == PTL_RPC_MSG_ERR, err
> == -30 req at 000001010d30e400 x9218/t0
> o8->ost1_UUID at tiger-oss-0-0.local_UUID:6 lens 240/272 ref 1 fl Rpc:R/0/40000
> rc 0/-30
> -- cut --

/usr/include/asm/errno.h says -30 = -EROFS.  That means your OST filesystem
has likely been remounted read-only because of a detected filesystem error.
Check your /var/log/messages for something like "LDISKFS-fs error ...:
Remounting filesystem read-only".  This will be accompanied by the reason
the filesystem is read-only.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.