Guided beta caseProintermediateQoS durability
Late subscribers miss the map
Allow a late-starting visualizer to receive the current static map without republishing continuously.
Pairs with QoS policies in ROS 2 Systems Debugging. Read the concept first, then diagnose it here.
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Subscribers started with the system receive `/map`; subscribers started later wait forever.
Ubuntu 24.04, ROS 2 Jazzy, Python and C++ nodes, browser telemetry workspace
System boundary
Trace only the relevant path.
map server/maplate visualizer
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.
Verification
Your repair must pass more than the visible symptom.
- Late subscriber receives map
- Only one map sample is required
- Hidden regression behavior
- Root cause explanation