Re: When can nfsv3 returns nfs3err_jukebox to client?

[Jeff Layton <jlayton@redhat.com>]

On Wed, 2016-07-06 at 12:06 +0200, Mkrtchyan, Tigran wrote:
> Hi,
> 
> ----- Original Message -----
> > 
> > From: "Pankaj Singh" <psingh.ait@gmail.com>
> > To: linux-nfs@vger.kernel.org
> > Sent: Wednesday, July 6, 2016 7:52:45 AM
> > Subject: When can nfsv3 returns nfs3err_jukebox to client?
> > 
> > Hi All,
> > 
> > I have read in the RFC 1813 that "nfs3err_jukebox" will be return only
> > when server is not able to finish the RPC request within time. To
> > indicate client to wait and retry again.
> > 
> > Could anyone tell me is there any senario where NFSv3 or SUN RPC can
> > send this error to client, if not returned from base filesystem?
> > 
> If a migrating file system exported through NFS, then server may return
> err_jukebox/delay to the client on an IO request while mounting the offline
> volume or tape to make it accessible.
> 
> Tigran.
> 

I think that was the original intent, but many servers will return that
whenever there is a problem that is perceived as temporary. For
instance, knfsd will often return that when it hits a problem
allocating memory while processing an RPC.

-- 
Jeff Layton <jlayton@redhat.com>