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Rosjava: Problem sending a string to the sample

asked 2012-01-31 23:56:03 -0600

Markus Eich
202 ●14 ●20 ●24

updated 2012-02-13 23:29:27 -0600

Martin Günther

flag of Germany

11816 ●82 ●159 ●198 https://www.dfki.de/en...

Dear all,

I am playing around with the rosjava tutorial. When running the Listener node together with the talker node it works fine and the Hello world is printed out. But if I run

rostopic pub /chatter std_msgs/String "Hello"

It will not work anymore. The listener throws the following exceptions:

01.02.2012 14:52:15 org.ros.internal.node.topic.UpdatePublisherRunnable run
SCHWERWIEGEND: java.lang.RuntimeException: java.net.ConnectException: Connection refused
01.02.2012 14:52:17 org.ros.internal.node.topic.UpdatePublisherRunnable run
SCHWERWIEGEND: org.ros.exception.RosRuntimeException: Connection exception:   eich-ThinkPad/192.168.103.42:39099
01.02.2012 14:52:17 org.ros.internal.transport.ConnectionTrackingHandler exceptionCaught
SCHWERWIEGEND: Channel exception: java.net.NoRouteToHostException: No route to host
01.02.2012 14:52:17 org.ros.internal.transport.ConnectionTrackingHandler exceptionCaught
SCHWERWIEGEND: Channel exception: java.net.NoRouteToHostException: No route to host

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answered 2012-02-13 22:47:17 -0600

Markus Eich
202 ●14 ●20 ●24

I solved the issue temporarily be setting ROS_IP to 127.0.0.1. How can I tell the Listener Sample node to use the external IP of my machine? Is the Listerner Sample node bound to localhost?

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Comments

Something is wrong with your network configuration. You shouldn't get a "no route to host" exception when trying to connect to your own external IP.

Martin Günther ( 2012-02-13 23:27:25 -0600 )edit

Have you tried setting ROS_IP to your external IP? 192.168.103.42 in your example log output.

damonkohler ( 2012-02-23 03:17:54 -0600 )edit

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Asked: 2012-01-31 23:56:03 -0600

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Last updated: Feb 13 '12

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