Device or resource busy Error

[guni9191]

Environment:
Ros2 dashing
Ubuntu 18.04LTS
Realsense D435i

1. At first I installed binary package and sometimes get errors like this:
   what(): get_xu(...). xioctl(UVCIOC_CTRL_QUERY) failed Last Error: Device or resource busy

2. To access the source code I have built this from source. In realsense_camera_node.cpp, inside onInit() function, I have added sleep_for after setupDevice() and setupPublishers(). It seems like the setup process is somehow too fast for the hardware.

virtual void onInit() { getParameters(); setupDevice(); rclcpp::sleep_for(std::chrono::nanoseconds(2000000000)); setupPublishers(); rclcpp::sleep_for(std::chrono::nanoseconds(2000000000)); setupStreams(); rclcpp::sleep_for(std::chrono::nanoseconds(2000000000)); timer_ = this->create_wall_timer(std::chrono::seconds(1), std::bind(&RealSenseCameraNode::publishStaticTransforms, this)); RCLCPP_INFO(logger_, "RealSense Node Is Up!"); }

And it does not produce error. This is only a temporary fix for me. Hope that this bug is fixed soon :)