Hi, On 25.07.2011 19:50, Joan Pau Beltran wrote: > Hi everyone, > > I have to questions about roslaunch and remote processes that seem to > point some bugs out. > We are using Diamondback as current release. > > And the second one, it seems that the roslaunch mechanism does not > honour the ROS_HOSTNAME variable for remote machines. In the .bashrc > file of the remote machine this variable is set to 'fugu-c.local', to > allow the remote machine name to be resolved properly using Avahi (that > seems to become quite standard in the latest distributions, this is the > reason for the .local suffix). The reason for this is that the .bashrc is not executed by the remote login. You should be able to fix this by using the tag in the launch file. > However when launching the above file, connection is stablished with the > remote machine, even the core is found if running there, but any node is > launched. This is the output: >> started roslaunch server http://10.42.43.1:51495/ >> remote[fugu-c.local-0] starting roslaunch >> remote[fugu-c.local-0]: creating ssh connection to fugu-c.local:22, >> user[user] >> remote[fugu-c.local-0]: ssh connection created >> >> SUMMARY >> ======== >> >> PARAMETERS >> ... >> MACHINES >> * fugu-c >> >> NODES >> / >> imu_node (memsense_imu/imu_node) >> >> ROS_MASTER_URI=http://fugu-c.local:11311 >> >> core service [/rosout] found >> error launching on [fugu-c.local-0, uri http://fugu-c:39451/]: Name or >> service not known >> Launch of the following nodes most likely failed: memsense_imu/imu_node > Apparently, the uri is computed as the result of the hostname command on > the remote machine, which returns only 'fugu-c' instead of > 'fugu-c.local'. I expected that setting the ROS_HOSTNAME would overwrite > this behaviour (actually it works for finding the remote core). If this > is a bug or a possible improvement, where should I submmit it? If not, > any idea on how to handle this? By now, we added the corresponding entry > to /etc/hosts to overcome the problem, but I would expect a better solution. Cheers, Christian Dornhege -- Albert-Ludwigs-University Institute of Computer Science Research Group Foundations of Artificial Intelligence Georges-Köhler-Allee 52 79110 Freiburg Phone: 0761 203 8074