gz service -l does not always output the full list of services

[jrutgeer]

Environment

• OS Version: Ubuntu 22.04
• Gazebo garden, built from source

Description

• Expected behavior: output of gz service -l should always list all available services
• Actual behavior: output of gz service -l randomly shows either the full list, or only a subset of the avalable services

Output

E.g. two consecutive calls of gz service -l yield following output:

$ gz service -l
/gui/camera/view_control
/gui/camera/view_control/reference_visual
/gui/camera/view_control/sensitivity
/gui/copy
/gui/follow
/gui/follow/offset
/gui/move_to
/gui/move_to/pose
/gui/paste
/gui/screenshot
/gui/view/collisions
/gui/view/com
/gui/view/frames
/gui/view/inertia
/gui/view/joints
/gui/view/transparent
/gui/view/wireframes
/marker
/marker/list
/marker_array
/world/Scara_Picker/level/set_performer
$ gz service -l
/gazebo/resource_paths/add
/gazebo/resource_paths/get
/gazebo/resource_paths/resolve
/gazebo/worlds
/gui/camera/view_control
/gui/camera/view_control/reference_visual
/gui/camera/view_control/sensitivity
/gui/copy
/gui/follow
/gui/follow/offset
/gui/move_to
/gui/move_to/pose
/gui/paste
/gui/screenshot
/gui/view/collisions
/gui/view/com
/gui/view/frames
/gui/view/inertia
/gui/view/joints
/gui/view/transparent
/gui/view/wireframes
/marker
/marker/list
/marker_array
/server_control
/world/Scara_Picker/control
/world/Scara_Picker/control/state
/world/Scara_Picker/create
/world/Scara_Picker/create_multiple
/world/Scara_Picker/declare_parameter
/world/Scara_Picker/disable_collision
/world/Scara_Picker/enable_collision
/world/Scara_Picker/entity/system/add
/world/Scara_Picker/generate_world_sdf
/world/Scara_Picker/get_parameter
/world/Scara_Picker/gui/info
/world/Scara_Picker/level/set_performer
/world/Scara_Picker/light_config
/world/Scara_Picker/list_parameters
/world/Scara_Picker/playback/control
/world/Scara_Picker/remove
/world/Scara_Picker/scene/graph
/world/Scara_Picker/scene/info
/world/Scara_Picker/set_parameter
/world/Scara_Picker/set_physics
/world/Scara_Picker/set_pose
/world/Scara_Picker/set_pose_vector
/world/Scara_Picker/set_spherical_coordinates
/world/Scara_Picker/state
/world/Scara_Picker/state_async
/world/Scara_Picker/system/info
/world/Scara_Picker/visual_config
/world/Scara_Picker/wheel_slip
$

It is random, e.g. sometimes many consecutive gz service -l each return the full list, but then sometimes a reduced set is reported.

At one time even just one service was reported:

$ gz service --list
/gui/follow
$

[caguero]

Thanks for reporting the issue. See #415.

[mjcarroll]

Closed by #415