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In productionProbeginnerMission idempotency

A restart repeats the delivery

Resume after a controller restart without delivering the same payload twice.

Pairs with Missions, docking, and operations in Nav2 Incident Response. Read the concept first, then diagnose it here.

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Operator report

The robot completed handoff, restarted, and executes the handoff action again.

Ubuntu 24.04, ROS 2 Jazzy, Nav2, Gazebo Harmonic, warehouse mission simulator

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01handoff action→
  2. 02mission checkpoint→
  3. 03task resumeOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • Restart resumes next phase
  • Handoff occurs once
  • Hidden regression behavior
  • Root cause explanation