ros2 runtime_error ai_generated true

运行时错误：无法取消正在取消中的目标

RuntimeError: Cannot cancel goal that is already being cancelled

ID: ros2/nav2-cancel-goal-multiple-times

其他格式: JSON · Markdown 中文 · English
85%修复率
85%置信度
1证据数
2024-02-15首次发现

版本兼容性

版本状态引入弃用备注
ros2-humble active — — —
ros2-iron active — — —
ros2-rolling active — — —

根因分析

Nav2动作服务器不支持对同一目标并发取消请求；多次调用取消会触发动作服务器内部状态机的竞态条件。

English

Nav2 action server does not support concurrent cancel requests on the same goal; calling cancel multiple times triggers a race condition in the action server's internal state machine.

generic

官方文档

https://docs.nav2.org/behavior_trees/overview.html

解决方案

  1. 在取消前检查目标是否处于终端状态：if (goal_handle->get_status() == action_msgs::msg::GoalStatus::STATUS_ACCEPTED || goal_handle->get_status() == action_msgs::msg::GoalStatus::STATUS_EXECUTING) { goal_handle->cancel(); }
  2. 使用互斥锁序列化取消调用：std::lock_guard<std::mutex> lock(cancel_mutex_); if (!cancel_in_progress_) { cancel_in_progress_ = true; goal_handle->cancel(); cancel_in_progress_ = false; }

无效尝试

常见但无效的做法:

  1. 70% 失败

    Race still occurs if two cancel calls happen within the sleep window; not a deterministic fix.

  2. 60% 失败

    Error is suppressed but the action server state may remain inconsistent, leading to future crashes.