ros2 runtime_error ai_generated partial

[WARN] [topic_statistics]: 在主题 '/scan' 上收到序列号 123 的消息，期望 124

[WARN] [topic_statistics]: Received message on topic '/scan' with sequence number 123, expected 124

ID: ros2/ros2-topic-statistics-mismatch

其他格式: JSON · Markdown 中文 · English
80%修复率
82%置信度
1证据数
2024-03-05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 — — —
rclcpp:18.0.0 active — — —

根因分析

主题统计监控检测到消息序列号有间隔，表示消息丢失或乱序传递，通常由于网络拥塞、CPU 负载高或 QoS 不兼容导致。

English

Topic statistics monitoring detected a gap in message sequence numbers, indicating dropped messages or out-of-order delivery, often due to network congestion, high CPU load, or QoS incompatibility.

generic

官方文档

https://docs.ros.org/en/humble/Tutorials/Intermediate/Topic-Statistics.html

解决方案

  1. 检查网络带宽和 CPU 使用率。如果过高，降低发布速率或使用更高效的序列化。示例：
ros2 topic hz /scan  # 检查当前速率
ros2 topic bw /scan   # 检查带宽

如果带宽高，调整发布器使用较低速率或减小消息大小。
  2. 如果使用不可靠的 QoS（例如 BEST_EFFORT），切换到 RELIABLE QoS 以减少丢失。在发布器代码中：
from rclpy.qos import QoSProfile, ReliabilityPolicy

qos = QoSProfile(depth=10, reliability=ReliabilityPolicy.RELIABLE)
self.publisher = self.create_publisher(LaserScan, '/scan', qos)

无效尝试

常见但无效的做法:

  1. Disabling topic statistics without investigating the root cause 60% 失败

    This hides the symptom but does not address the underlying message loss, which may affect application behavior.

  2. Increasing the publisher's publishing rate to compensate 80% 失败

    Higher rate increases network and CPU load, potentially worsening the problem.