Hi Eric, thanks for reply

My netcat version is v1.10-38 and I am using Debian on 192.XXX.XXX.XX

# nc -h
[v1.10-38]
connect to somewhere:    nc [-options] hostname port[s] [ports] ...
listen for inbound:    nc -l -p port [-options] [hostname] [port]

I use Ubuntu to access the Debian machine, and now my Java class is like this:

public static void main(String[] args) {
        Connect conn = null;
        try {
            conn = new Connect("xen+ssh://root@192.168.XXX.XX/?netcat=/bin/netcat", true);

but is still throwing the error:
libvir: RPC error : End of file while reading data: /bin/netcat: invalid option -- 'U'
nc -h for help: Input/output error
exception caught:org.libvirt.LibvirtException: End of file while reading data: /bin/netcat: invalid option -- 'U'

I have files on the client machine that are /usr/bin/ncat , /bin/netcat and /etc/alternatives/netcat. I am not sure which I should use.

Thanks, Felipe


On Tue, Oct 2, 2012 at 12:27 PM, Eric Blake <eblake@redhat.com> wrote:
On 10/02/2012 09:10 AM, Felipe Oliveira Gutierrez wrote:
> Hi,
>
> I am using java to connect to the xen, but my class is throwing a
> exception. Does anyone know what is happening?
>
> public class TestConnection {
>     public static void main(String[] args) {
>         Connect conn = null;
>         try {
>             conn = new Connect("xen+ssh://root@192.XXX.XXX.XX/", true);
>
> libvir: RPC error : End of file while reading data: nc: invalid option --
> 'U'

What distro is running the machine at 192.XXX.XXX.XX, and what version
of nc is it using (remembering that Fedora and Debian nc come from
different heritages)?  What does 'nc --help' output on that machine?

It may be possible to connect by installing an updated nc on that
machine, and/or altering your xen+ssh://... URI to include a ?netcat=...
parameter that points to an alternate location on that server that
understands -U.

http://libvirt.org/remote.html#Remote_URI_parameters

--
Eric Blake   eblake@redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org




--
-- Felipe Oliveira Gutierrez
-- lipe.82@gmail.com
-- https://sites.google.com/site/lipe82/Home/diaadia