How about remote subscribers ?
I dont know if this use case exist or not but There can be remote publisher/subscriber?
What happens in c++? Do code core refuse connection?
Rosjava need fix ...I am seeing this exception but publisher and subscriber are able to communicate..(with exception)
Thanks and Regards
Abhishek Verma
ROS nodes must have unique names. Two start two nodes of the same type in c++, you would use the command line arguments to set the name of the nodes, which would override the default.I'm not sure if this command line argument name remapping was implemented in java, but if it wasn't, you may consider having java append a random number to the end of the node name.--NickOn Tue, Jun 21, 2011 at 10:33 AM, Abhishek Verma <toabhishekverma@gmail.com> wrote:
_______________________________________________Hi Friends,I am seeing following exception21-Jun-2011 18:29:01 org.apache.xmlrpc.server.XmlRpcErrorLogger logSEVERE: Failed to invoke method registerSubscriber in class org.ros.internal.node.xmlrpc.MasterImpl: nullorg.apache.xmlrpc.common.XmlRpcInvocationException: Failed to invoke method registerSubscriber in class org.ros.internal.node.xmlrpc.MasterImpl: nullat org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:129)at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106)at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46)at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86)at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200)at org.apache.xmlrpc.webserver.Connection.run(Connection.java:208)at org.apache.xmlrpc.util.ThreadPool$Poolable$1.run(ThreadPool.java:68)Caused by: java.lang.IllegalStateExceptionat com.google.common.base.Preconditions.checkState(Preconditions.java:129)at org.ros.internal.node.server.MasterServer.addSlave(MasterServer.java:80)at org.ros.internal.node.server.MasterServer.registerSubscriber(MasterServer.java:110)at org.ros.internal.node.xmlrpc.MasterImpl.registerSubscriber(MasterImpl.java:123)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115)My code is//Publishernode = new Node("Camera1", configuration);publisher = node.createPublisher("Camera1",org.ros.message.sensor_msgs.Image.class);....................//Subscribernode = new Node("Camera1", configuration);System.out.println("ScreenView.main() Starting");// final Log log = node.getLog();node.createSubscriber("Camera1", new MessageListener<org.ros.message.sensor_msgs.Image>() {public void onNewMessage(org.ros.message.sensor_msgs.Image message) {System.out.println("Subscriber \"" + message + "\"");}}, org.ros.message.sensor_msgs.Image.class);Reason behind this exception is Nodes with same name.If I change this name and create different nodes in publisher and subscribers code then its fine.Anyone has any idea why is that or we are not supposed to create node with same name?
Thanks and Regards
Abhishek Verma
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