nfs problems

[Daniel Braniss]

> On 29/06/2012 10:45, Daniel Braniss wrote:
> >> Hi,
> >> starting about last week, I'm getting:
> >>
> >> rsync: writefd_unbuffered failed to write 4 bytes to socket [sender]: Broken 
> >> pipe (32)
> >> rsync: write failed on "/net/rnd/dist/tmp/local/amd64.FreeBSD_8.3-wip/compat/li
> >> nux/usr/lib/locale/locale-archive.tmpl": Permission denied (13)
> >> rsync error: error in file IO (code 11) at receiver.c(322) [receiver=3.0.9]
> >> rsync: connection unexpectedly closed (21872 bytes received so far) [sender]
> >> rsync error: error in rsync protocol data stream (code 12) at io.c(605) 
> >> [sender=3.0.9]
> >>
> >> the server is running 8.2, but the client is very upto date, 8.3-stable as of 
> >> this morning
> >> (local time).
> >>
> >> after runing rsync several times, it finaly gets synced.
> >>
> >> another item is that i'm using am-utils, but I don't see it causing the problem
> >>
> >> I will try using tcp (instead of udp) soon.
> >>
> >> any insights?
> >>
> >> cheers,
> >> 	danny
> > the problem is most probably NFS/UDP related.
> >
> > I took am-utils out of the equation.
> > mounted using TCP, and no problems
> > mounted using UDP:
> > Jun 29 12:38:14 pe-02 kernel: nfs server nrnfdn:sf/s ds isseterr:vve ernr o 
> > trrnn dd:r:e/s/pddoinisdsitt::n  nngoo
> > Jun 29 12:38:14 pe-02 kernel: tt
> > Jun 29 12:38:14 pe-02 kernel: 
> > Jun 29 12:38:14 pe-02 kernel: <<66>>  rreessppoonnddiinngg
> > Jun 29 12:38:14 pe-02 kernel: 
> > Jun 29 12:38:14 pe-02 kernel: nfs server rnd:/dist: not responding
> > Jun 29 12:38:14 pe-02 last message repeated 11 times
> > Jun 29 12:38:27 pe-02 kernel: nfs server rnd:/dist: is alive again
> >
> > the above happens about every 15 seconds
> > (you have to learn to read in between the bytes :-)
> >
> > cheers,
> > 	danny
> >
> Its also possible you are hitting a bug I came across recently.
> See http://lists.freebsd.org/pipermail/freebsd-current/2012-June/034860.html
> basicly  mountd may give incorrect permission denied errors when it is
> refreshing the exports list due to non-atomic operations.
> see
> 
> kern/131342
> kern/136865
Hi Vince,
I thought so too, there used to be a bug caused by am-utils umounting, succeding
even if the mount was active, then re-mounting, which caused all kind
of problems, the work around was to increase the timeout.
But I don't think it's the case here, unless mountd has a life of its
own. Furthermore, rsync works without a glitch when mounted nfs/tcp.
thanks,
	danny