when i run my urdf file.The process likes stunk,it stopped fo a long time in the final line. The following is the information in terminal:

zsa@zsa-virtual-machine:~$ roslaunch zsa_robot display.launch model:="robotz.urdf" ... logging to /home/zsa/.ros/log/bab60858-3074-11e7-a6d6-000c29fec243/roslaunch-zsa-virtual-machine-3039.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://zsa-virtual-machine:60832/

SUMMARY

PARAMETERS * /robotdescription * /rosdistro * /rosversion * /usegui

NODES / jointstatepublisher (jointstatepublisher/jointstatepublisher) robotstatepublisher (robotstatepublisher/robotstatepublisher)

auto-starting new master process[master]: started with pid [3053] ROSMASTERURI=http://localhost:11311

setting /runid to bab60858-3074-11e7-a6d6-000c29fec243 process[rosout-1]: started with pid [3066] started core service [/rosout] process[jointstatepublisher-2]: started with pid [3069] process[robotstate_publisher-3]: started with pid [3079]