nfs problems

[Vincent Hoffman]

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

also.


Vince




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