parameter_blackboard node parameter cannot be set because it was not declared

[fujitatomoya]

Bug report

Required Info:

• Operating System:
  • Ubuntu18.04
• Installation type:
  • Source
• Version or commit hash:
  • master repo
• DDS implementation:
  • Fast-RTPS
• Client library (if applicable):
  • rclcpp, demo_nodes_cpp

Steps to reproduce issue

Terminal-1:

root@6cc2c62d0dd0:~/ros2_colcon_ws# ros2 run demo_nodes_cpp parameter_blackboard
[INFO] [parameter_blackboard]: Parameter blackboard node named '/parameter_blackboard' ready, and serving '1' parameters already!
[WARN] [rclcpp]: Failed to set parameter: parameter 'foo' cannot be set because it was not declared

Terminal-2:

root@6cc2c62d0dd0:~/ros2_colcon_ws# ros2 param set /parameter_blackboard foo 1
Setting parameter failed: parameter 'foo' cannot be set because it was not declared

Expected behavior

parameter should be set in success.

Actual behavior

parameter does not get set cz parameter is undeclared.

Additional information

parameter_blackboard specifies NodeOption allow_undeclare_parameter, so it should be able to set parameter without error.

the following fix might be related,

b214324

Feature request

W.I.P

Feature description

N.A

Implementation considerations

N.A

[ivanpauno]

I've been able to reproduce the issue

[fujitatomoya]

ros2/demos#389 can fix this problem.

[fujitatomoya]

@ivanpauno

this can be closed.