samba+ctdb,Input/Output error (with Linux cifs filesystem)

[Jeff Layton]

On Sat, 13 Jul 2013 19:55:14 +1000
Martin Schwenke <martin at meltin.net> wrote:

> On Tue, 9 Jul 2013 17:48:42 +0800, shuai li <lishuai.ujs at gmail.com>
> wrote:
> 
> >            I build samba+ctdb environment with 3 machines,the machine
> > 192.168.4.79 acted as client,machine 192.168.4.88 and machine 192.168.4.237
> > acted as glusterfs and ctdb server,during the copy operation on client,I
> > shutdown a server to verify ctdb's virtual IP drifting.But after the
> > shutdown operation,Input/Output error occured on client. [...]
> 
> I'm not sure if cifs client filesystem will retry after a disconnect.
> Other people on this list will be able to give advice about that.
> 
> I think that's the most likely issue.  You could check a couple of
> things:
> 
> * What does the ARP table on the client say after the failover?  Does
>   it match the NIC on the new node hosting the IP?
> 
> * Do you see the CIFS connection get reset if you do a tcpdump or
>   similar?
> 
> This certainly isn't a configuration I have tested.  For Linux clients
> I have tested NFS.
> 
> peace & happiness,
> martin

(cc'ing linux-cifs ml)

Typically, the Linux CIFS client will attempt to reestablish the
connection after it gets shut down. A capture of this event would be
nice.

-- 
Jeff Layton <jlayton at redhat.com>