Hello,

actually I remember having these phantom nodes as well, when trying to
manage ROS communicate between linux and windows. That happened
everytime I failed to regulary terminate a node on the windows side,
because the thread that created the node crashed. I guess that is
regular behavior for nodes that have been registered with roscore, but
do not respon anymore.

Cheers,
Klaus


ros_user@yahoo.co.jp さんは書きました:
> Hi, Ken
> 
> Your advice helps me a lot.
> When I set ROS_IP on the Windows machine, I could launch the 
> communication between Linux and Windows.
> 
> Thanks a lot!
> 
> Keisuke
> 
> 
> *Ken Conley <kwc@willowgarage.com>* wrote:
> 
>     Keisuke,
> 
>     Are you sure that your network is configured correctly for ROS? Can
>     your Linux machine ping "ihcikuy". If not, you may need to set ROS_IP
>     on the Windows machine.
> 
>     http://www.ros.org/wiki/ROS/Troubleshooting
> 
>     hope this helps,
>     Ken
> 
>     2010/8/13 :
>      > Hi, all.
>      >
>      > I've done following tutorial and tried to publish/subscribe
>     topics between
>      > Window OS and Linux OS.
>      >
>      > http://www.ros.org/wiki/cturtle/Installation/Windows
>      >
>      > ----------------------
>      >
>      > My environment is as follows.
>      >
>      > ------
>      >
>      > 1. Windows side
>      >
>      > Windows XP Professional SP3
>      >
>      > Copied compiled roslib, rospy, std_msgs, talker.py, and
>     listener.py. (All
>      > are compiled in Linux OS with the version cturtle)
>      >
>      > The line "roslib.load_manifest("package_name")" of talker.py and
>     listener.py
>      > is commented out.
>      > (
>      > The code is base on
>      >
>     http://www.ros.org/wiki/ROS/Tutorials/WritingPublisherSubscriber%28python%29
>      > )
>      >
>      > ROS_MASTER_URI=http://192.168.0.6:11311
>      >
>      > ROS_ROOT is correctly modified.
>      >
>      > PYTHONPATH for roslib, rospy and std_msgs is correctly set.
>      >
>      > python2.6 and Pyyaml for python2.6 installed.
>      >
>      > ------
>      >
>      > 2. Linux side
>      >
>      > Ubuntu 10.04
>      >
>      > #uname -a
>      > Linux ubuntu 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29
>     UTC 2010
>      > i686 GNU/Linux
>      > Installed ROS cturtle
>      >
>      > IP : 192.168.0.6
>      > hostname : ubuntu
>      >
>      > ROS_MASTER_URI=http://localhost:11311
>      >
>      > # python --version
>      > Python 2.6.5
>      >
>      > ------
>      >
>      > When I run roscore on the Linux side and both listener/talker on
>     the Windows
>      > side, the messages between two nodes are correctly sent.
>      > I could see the messages for both terminals in Windows OS.
>      >
>      > On the linux side
>      > # rostopic list
>      > /chatter
>      > /rosout
>      > /rosout_agg
>      >
>      > so I tried to see
>      > # rostopic echo /chatter
>      > but I couldn't see anything even when I could see messages on the two
>      > terminals in the Windows side.
>      >
>      > When I run
>      > # rxgraph
>      > I saw strange nodes.
>      > Nomally all nodes contains just one black circle,
>      > but the nodes created on Windows OS contain double red circles.
>      > When I clicked the talker node, I got following error.
>      >
>      > ERROR: Communication with node[http://ihcikuy:1586/] failed!
>      >
>      > The lister node on rxgraph has different name like
>     "listener_1104_128...."
>      > and also surrounded by double red circles.
>      > When I clicked the lister node, I got
>      >
>      > ERROR: Communication with node[http://ihcikuy:1586/] failed!
>      >
>      > Since ROS_MASTER_URI on the Windows machine was set to be
>     "192.168.0.6", it
>      > cannot be "ihcikuy".
>      >
>      > ------
>      >
>      > Does anybody has same kind of experience?
>      > What's the problem?
>      >
>      > ----------------
>      >
>      > Also, I tried to run lister.py on Linux and talker.py on Windows,
>      > but I couldn't get any results.
>      >
>      > Did I make mistakes following the tutorial?
>      >
>      > Any information are welcome.
>      >
>      > Thanks in advance,
>      >
>      > Keisuke
>      >
>      >
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