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I am using the standard roscore. Here is the stack trace. It works intermittently and I cannot tell why.
roscore
rosrun rosjava_bootstrap run.py rosjava_tutorial_pubsub org.ros.tutorials.pubsub.Listener
rostopic pub -1 /chatter std_msgs/String 'its working now'
... Loading node class: org.ros.tutorials.pubsub.Listener Sep 26, 2011 2:49:45 PM org.ros.internal.node.topic.UpdatePublisherRunnable run SEVERE: org.ros.exception.RosRuntimeException: java.net.ConnectException: connection timed out Sep 26, 2011 2:49:45 PM org.jboss.netty.channel.DefaultChannelPipeline WARNING: An exception was thrown by a user handler while handling an exception event ([id: 0x0064c34e] EXCEPTION: java.net.ConnectException: connection timed out) org.ros.exception.RosRuntimeException: java.net.ConnectException: connection timed out at org.ros.internal.transport.ConnectionTrackingHandler.exceptionCaught(ConnectionTrackingHandler.java:63) at org.jboss.netty.channel.Channels.fireExceptionCaught(Channels.java:432) at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processConnectTimeout(NioClientSocketPipelineSink.java:375) at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:283) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) Caused by: java.net.ConnectException: connection timed out at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processConnectTimeout(NioClientSocketPipelineSink.java:371) ... 4 more
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