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roscore on multimachine issue

asked 2019-11-20 05:48:51 -0500

Aviad gravatar image


Until yesterday my multi machines works well. I have two computers, one master and one slave. Today, I tried to use chrony for use the same clock in the both computer. I did the tests in the master machine. Since then the slave can not communicate to the master which is run with roscore but in the other side, if the roscore is run in the "slave" the "master" can communicate to it.

I get this error in the slave machine when I try to run roscore:

WARNING: ROS_MASTER_URI host is not set to this machine

Someone has any idea what happens?

Thanks, Aviad

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It would probably be a good idea to show values of ROS_MASTER_URI, ROS_IP, ROS_HOSTNAME and the hostnames and IP addresses for all involved hosts.

gvdhoorn gravatar image gvdhoorn  ( 2019-11-20 06:13:46 -0500 )edit

In the master machine:


in the slave machine:



Again. It worked fine until I tried to work with chrony. I used this commands if it could helps:

firewall-cmd --zone=public --add-port=123/udp

firewall-cmd --zone=public --add-port=323/udp
Aviad gravatar image Aviad  ( 2019-11-20 07:09:05 -0500 )edit

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answered 2019-11-20 07:35:01 -0500

Aviad gravatar image

So, the problem was relevant to the command lines above really. I just remove the firewalld pkg and it is working now.

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Asked: 2019-11-20 05:48:51 -0500

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Last updated: Nov 20 '19