RTPS_TRANSPORT_SHM Error

Hi there

I'm using ROStoolbox and ROS2 foxy, Ubuntu20.04LTS, Matlab 2022a.

I want to see my internal node and Matlab node in the Terminal.

So I have set the same ROS_DOMAIN_ID and RMWImplements for both nodes.

But when I type the command 'ros2 node list' to check my nodes It gives me an error.

2022-05-16 01:01:53.008 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port8162: open_and_lock_file failed -> Function open_port_internal

2022-05-16 01:01:53.009 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port8164: open_and_lock_file failed -> Function open_port_internal

2022-05-16 01:01:53.009 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port8163: open_and_lock_file failed -> Function open_port_internal

2022-05-16 01:01:53.009 [RTPS_TRANSPORT_SHM Error] Failed init_port fastrtps_port8165: open_and_lock_file failed -> Function open_port_internal

I expect that command 'ros2 node list' will show me the iternalROS node and Matlab node.

How can i solve this problem?

Thank you for reading my error log and If there are someone who know about this, It will be helpful to me.

[Karthik Reddy Vennapureddy]

Hello,

This issue is observed when trying to communicate MATLAB R2022a ROS Toolbox (uses Fast-DDS 2.1.1) with other version of FastDDS in ROS 2 Foxy terminal. This is an open issue in FastDDS.

As a workaround to see the ros2 node list, please run the below commands in ROS 2 Foxy terminal:

1. ros2 daemon stop.
2. export RMW_IMPLEMENTATION=rmw_cyclonedds_cpp.
3. ros2 node list

Try step 3 to see the list of nodes running in both MATLAB and Foxy terminal.(execute the step 1-2 times incase you don't see nodes for the first time).

Thanks,

Karthik Reddy

[Hyounjun Oh]

Thank you so much! It solved my problem : >

Answer 1

[Jagadeesh Konakalla]

This issue is observed when trying to communicate MATLAB R2022a ROS Toolbox (uses Fast-DDS 2.1.1) with other version of FastDDS in ROS 2 Foxy terminal. This is an open issue in FastDDS.

As a workaround to see the ros2 node list, please run the below commands in ROS 2 Foxy terminal:

1. ros2 daemon stop.
2. export RMW_IMPLEMENTATION=rmw_cyclonedds_cpp.
3. ros2 node list

Try step 3 to see the list of nodes running in both MATLAB and Foxy terminal.(execute the step 1-2 times incase you don't see nodes for the first time).

Answer 2

[Benny]

Thank you for helping me a lot, my problem is solved.

flappy bird