Problems connecting to Virtualbox hypervisor using libvirt java binding

[Tarciso Oliveira <tarcisocomp@xxxxxxxxx>]

I am trying to connect to the virtualbox hypervisor through libvirt java binding.

I am on Ubuntu 10.04 and I have installed libvirt-0.85, libvirt-java-0.4.6 and virtualbox-ose-dkms. I have configured libvirt project and its java binding at Eclipse and the default test of the binding runs properly. When I try to run a simple test in java with the connection:

conn = new Connect("vbox:///session", false)

I get the following exception: "exception caught:org.libvirt.

LibvirtException: Failed to start the nwfilter driver: Is the daemon running ?"

If I try to do the same thing, but instead of using the java biding 
I  use virsh, it works. I am able to connect and start the virtual 
machine successfully, although none of the nwfilter commands work in 
virsh.

(The nwfilter-list command shows this error:  Failed to list network
 filters. This function is not supported by the connection driver: 
virConnectNumOfNWFilters)

If I run the same java test using the Test hypervisor connection, things work properly.

I don't know if I have to install or configure something else in 
order to get the nwfilter working or if virtualbox doesn't provide 
support for it, and if it doesn't provide, how can I get rid of this 
exception and use virtualbox virtual machine connection through java 
binding ?

My objective is being able to use libvirt library commands in a 
software (in java) which uses virtualization to run jobs in different 
machines, but without the connection to the hypervisor I can't do 
anything.

I apologize if this question has been already 
answered. I have tried hard to get the answers for it looking at forums 
and also in the discussions of this list, but I couldn't. 

What am I missing?

Thanks!

-- 
Tarciso Braz de Oliveira Filho
Graduando em Ciência da Computação
LSD - Laboratório de Sistemas Distribuídos
UFCG
2011