ros2 runtime_error ai_generated true

rclpy.executors.ExternalShutdownException: Context must be initialized before use

ID: ros2/executor-spin-error

Also available as: JSON · Markdown
88%Fix Rate
88%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
2 active — — —

Root Cause

Node shutdown was triggered externally (Ctrl+C) while the executor was spinning. Context is no longer valid.

generic

Workarounds

  1. 92% success Wrap spin in try/except for graceful shutdown 
    try: rclpy.spin(node) except (KeyboardInterrupt, ExternalShutdownException): pass finally: node.destroy_node(); rclpy.try_shutdown()
  2. 90% success Use rclpy.try_shutdown() instead of rclpy.shutdown() for safe cleanup
  3. 85% success Register an on_shutdown callback for resource cleanup 
    context.on_shutdown(cleanup_function)

Dead Ends

Common approaches that don't work:

  1. Catch the exception and keep spinning 90% fail

    Context is already destroyed; continued spinning causes undefined behavior and potential segfault

  2. Call rclpy.init() again after shutdown 78% fail

    Multiple init/shutdown cycles are fragile and leak resources in many RMW implementations