ros2 runtime_error ai_generated true

tf2.BufferCore::lookupTransform: Lookup would require extrapolation into the future

ID: ros2/tf2-buffer-core-lookup-transform-time-travel

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
1Evidence
2023-05-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Humble active — — —
Iron active — — —
Jazzy active — — —
Rolling active — — —

Root Cause

The requested transform time is later than the latest available frame timestamp, often due to clock skew, sim_time misconfiguration, or publishing delay.

generic

中文

请求的变换时间晚于最新可用帧的时间戳，通常由时钟偏差、sim_time配置错误或发布延迟导致。

Official Documentation

https://docs.ros.org/en/rolling/Tutorials/Intermediate/Tf2/Debugging-Tf2-Problems.html

Workarounds

  1. 85% success Set use_sim_time=True on all nodes and ensure /clock is published correctly. Run 'ros2 bag play --clock' to simulate time. 
    Set use_sim_time=True on all nodes and ensure /clock is published correctly. Run 'ros2 bag play --clock' to simulate time.
  2. 75% success Use tf2_ros::Buffer::canTransform() with a timeout before lookupTransform to wait for data. 
    Use tf2_ros::Buffer::canTransform() with a timeout before lookupTransform to wait for data.
  3. 70% success Check and synchronize system clocks across machines using NTP or chrony. 
    Check and synchronize system clocks across machines using NTP or chrony.

中文步骤

  1. Set use_sim_time=True on all nodes and ensure /clock is published correctly. Run 'ros2 bag play --clock' to simulate time.
  2. Use tf2_ros::Buffer::canTransform() with a timeout before lookupTransform to wait for data.
  3. Check and synchronize system clocks across machines using NTP or chrony.

Dead Ends

Common approaches that don't work:

  1. Increasing the transform timeout in lookupTransform() call 60% fail

    Timeout increase doesn't fix clock misalignment; the transform still doesn't exist at the requested time.

  2. Manually setting ROS time using /clock publisher to wall clock 70% fail

    If use_sim_time is true, wall clock updates are ignored; the buffer only uses simulated time.

  3. Restarting all nodes 50% fail

    Transient clock skew or missing data persists if the root cause (e.g., late publisher) isn't addressed.