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Is this to be expected?
Yes, and it is also not a limit to array/list/sequence sizes in the message format (as your question seems to imply), but a usability feature.
The ROS 2 rostopic CLI tool by default will not print full length arrays for lists/arrays/sequences longer than 128 elements to prevent "runaway" terminals (where you are waiting 5 minutes for rostopic to quit after having rostopic echod a topic carrying PointCloud msgs fi).
You can disable/change this behaviour in two ways:
--truncate-length option (here)--full-length to your echo invocation (here)Note that this is similar to rostopic echo's --noarr in ROS 1 (although that didn't allow you to specify a limit to the nr of elements it did print).
Thank you for the information, I will try the above mentioned changes.
I was hopping to ask another question relating topic echo. Embedded custom messages are not being printed with ROS2 topic echo but, if I create a subscriber, the messages are properly being received. Is this a setting issue?
Yea, sorry about that. I was just thinking that it might be related the rostopic echo setting as well. That is why I was debating whether to ask a different question or post it here. Thank you for your answer though.
Asked: 2019-02-11 20:36:36 -0500
Seen: 476 times
Last updated: Feb 12 '19
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