roslaunch erros out when trying to launch master when master is already running via roscore

edit

Guys,

I am having this issue where I can't use roslaunch command because every time I run something like:

roslaunch ros_robotics ddrobot_rviz.launch model:=dd_robot.urdf

it will error out with following message:

started roslaunch server http://localhost:34665/

SUMMARY

PARAMETERS
 * /joint_state_publisher/use_gui: True
 * /robot_description: <?xml version="1....
 * /rosdistro: kinetic
 * /rosversion: 1.12.7

NODES
  /
    joint_state_publisher (joint_state_publisher/joint_state_publisher)
    robot_state_publisher (robot_state_publisher/state_publisher)
    rviz (rviz/rviz)

auto-starting new master
process[master]: started with pid [2401]
ERROR: Unable to start XML-RPC server, port 11311 is already in use
Unhandled exception in thread started by <bound method XmlRpcNode.run of <rosgraph.xmlrpc.XmlRpcNode object at 0x7f38a45133d0>>
Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rosgraph/xmlrpc.py", line 215, in run
    self._run()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rosgraph/xmlrpc.py", line 284, in _run
    self._run_init()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rosgraph/xmlrpc.py", line 234, in _run_init
    self.server = ThreadingXMLRPCServer((bind_address, port), log_requests)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rosgraph/xmlrpc.py", line 115, in __init__
    SimpleXMLRPCServer.__init__(self, addr, SilenceableXMLRPCRequestHandler, log_requests)
  File "/usr/lib/python2.7/SimpleXMLRPCServer.py", line 593, in __init__
    SocketServer.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)
  File "/usr/lib/python2.7/SocketServer.py", line 417, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/SocketServer.py", line 431, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use
ERROR: could not contact master [http://localhost:11311//]
The traceback for the exception was written to the log file
[master] killing on exit

It seems that roslaunch tries to launch a master server while there is already one running in another terminal window.

Any idea how to resolve this?

Thanks!

As requested, this launch file might be helpful. That said, this issue is not specific to this particular launch file. Every launch file on my system errors out like this.

<launch>
  <!-- set parameter on Parameter Server -->
  <arg name="model" />
  <param name="robot_description"
    command="$(find xacro)/xacro.py '$(find ros_robotics)/urdf/$(arg model)'" />

  <!-- send joint values from gui -->
  <node name="joint_state_publisher" pkg="joint_state_publisher" type="joint_state_publisher">
    <param name="use_gui" value="TRUE"/>
  </node>

  <!-- use joint positions to update tf -->
  <node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher"/>

  <!-- visualize robot model in 3D -->
  <node name="rviz" pkg="rviz" type="rviz" args="-d $(find ros_robotics)/urdf.rviz" required="true" />

</launch>

Roy

Edit: @gvdhoorn

 roy@RoysMacUbuntu:~/catkin_ws/src/ros_robotics/urdf$ printenv | grep ROS
ROS_ROOT=/opt/ros/kinetic/share/ros
ROS_PACKAGE_PATH=/opt/ros/kinetic/share
ROS_MASTER_URI=http://localhost:11311//
ROS_HOSTNAME=localhostsource
ROSLISP_PACKAGE_DIRECTORIES=
ROS_DISTRO=kinetic