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

Jeff Layton jlayton at
Mon Jul 15 13:07:49 MDT 2013

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

> On Tue, 9 Jul 2013 17:48:42 +0800, shuai li <lishuai.ujs at>
> wrote:
> >            I build samba+ctdb environment with 3 machines,the machine
> > acted as client,machine and machine
> > 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

Jeff Layton <jlayton at>

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