UPDATE: After waiting long enough, the installation finishes. So I'll close this question. Thanks.

I'm building ROS Hydro Desktop Full following this:

http://wiki.ros.org/hydro/Installation/Source

and after I did this $ wstool init -j8 src hydro-desktop-full-wet.rosinstall

and wait a while, the shell keeps out put this message

[opencv2] still active
[opencv2] still active
[opencv2] still active
[opencv2] still active

I've did several search with google enter code hereand in answers.ros.org without any luck, only found that when other people build Hyrdo from source (like this guy http://rootf.blogspot.com/2013/05/how-to-install-rosrobotics-operatin ... ... ... [opencv2] still active [opencv2] still active [opencv2] Done.

update complete.g.html), the shell will output something like my error, but the installation continues and finishes.

[pcl,opencv2,rospack,rqt_console] still active
[rqt_console] Done.
[rospack] Done.
[pcl,opencv2,depth_image_proc,tf2_msgs,qt_gui_app,laser_geometry] still active
...
...
...
[opencv2] still active
[opencv2] still active
[opencv2] Done.

update complete.

And I've tried this installation several times, it always stuck at the same place. I will leave the machine running for longer time and see if it will finish.

I'm using Ubuntu 12.04.04 LTS 64bit version.'