RMW-0001 ros2 communication_error ai_generated true

[错误] [rmw_fastrtps_cpp]: create_publisher() 失败：DDS 创建发布者失败

[ERROR] [rmw_fastrtps_cpp]: create_publisher() failed: DDS create_publisher failed

ID: ros2/rmw-fail-fast-no-interface

其他格式: JSON · Markdown 中文 · English
82%修复率
85%置信度
1证据数
2023-09-15首次发现

版本兼容性

版本状态引入弃用备注
ROS2 Humble (Hawksbill) active — — —
ROS2 Iron (Irwini) active — — —
ROS2 Jazzy (Jalisco) active — — —

根因分析

当节点的话题类型未注册或 DDS 域参与者处于不一致状态时（通常由于缺少类型支持库或过早关闭），Fast DDS 发布者创建会失败。

English

Fast DDS publisher creation fails when the node's topic type is not registered or the DDS domain participant is in an inconsistent state, often due to missing type support library or premature shutdown.

generic

官方文档

https://docs.ros.org/en/humble/Tutorials/Intermediate/Discovering-DDS.html

解决方案

  1. Ensure the node's topic type is explicitly registered before creating the publisher. In Python, call `node.declare_parameter('use_sim_time', False)` and then `node.create_publisher(MyMsg, 'topic', 10)` after a short sleep to allow DDS to initialize.
  2. In C++, add a small delay (e.g., `std::this_thread::sleep_for(std::chrono::milliseconds(100))`) after creating the node and before creating the publisher to ensure the DDS participant is fully ready.

无效尝试

常见但无效的做法:

  1. 60% 失败

    Reinstalling rmw_fastrtps_cpp via apt-get doesn't help because the issue is type registration, not the middleware installation.

  2. 70% 失败

    Changing RMW_IMPLEMENTATION to rmw_cyclonedds_cpp may mask the problem but doesn't fix the underlying DDS participant state, and can introduce new compatibility issues.