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1

Why roscore takes such a long time to be created?

asked 2018-04-11 03:47:45 -0500

MTV1368
21 ●3 ●5 ●5

I initially used "$roscore to"create the master and it did take 10 seconds to be done. However when I tried an hour later to see the detail of the node by "$rosnod list" the following message appeared: "ERROR: Unable to communicate with the master!" I did try to create another master node by $roscore but it took half o=an hour and still yet to be showed. Can someone kindly explain why it takes such a long time?

Thank you in advance

best regards

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Comments

1

Did you ever set one of the environment variables ROS_IP, ROS_HOSTNAME, ROS_MASTER_URI or similar?

gvdhoorn ( 2018-04-11 05:22:02 -0500 )edit

Yes I did it once and it was ok it did work but I closed terminal due to an error and it didn't work in the same manner.

MTV1368 ( 2018-04-11 09:55:06 -0500 )edit

1

Did you add those to $HOME/.bashrc?

gvdhoorn ( 2018-04-11 09:56:59 -0500 )edit

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answered 2020-10-27 13:50:20 -0500

Haresh
11 ●1 ●3 ●3

i removed ROS_IP, ROS_MASTER_URI from ~/.bashrc file and it works

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answered 2021-12-01 01:03:32 -0500

Hetal Priyadarshi
1 ●1 ●1

Did you change your Wifi recently? or fiddle with the home/.bashrc ?

its taking so long because it can't find the ROS server at the mentioned IP in ROS_HOSTNAME, ROS_MASTER_URI etc.

To solve this edit .bashrc to this:

export ROS_MASTER_URI=http://127.0.0.1:11311

export ROS_HOSTNAME=127.0.0.1

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Asked: 2018-04-11 03:47:45 -0500

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Last updated: Dec 01 '21

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