Attempt Counter Reset Mid-Loop Debugging Lab

Attempt Counter Reset Mid-LoopReliabilityEasyPreparing workspaceAutosaved

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Incident Dossier

Attempt Counter Reset Mid-Loop

A reliability team's retry helper was observed to call a downstream service far more times than its configured retry budget during an outage. Logs showed long sequences of identical attempts with the counter apparently starting over each time, suggesting the bookkeeping for the retry budget is broken.

Initial failing signalRetry helper overshoots its attempt budgetExpected operation called retries + 1 times before rejecting · received operation called many more times than retries + 1

Progress

1Reproduce the bugRun checks

2Edit the fixOpen

3Pass checksOpen

4Submit fixOpen

Reproduction Steps

Run npm test.
Inspect the retry loop and follow the value of the attempts variable across iterations.
Notice that the counter never accumulates past 1.
Make the smallest correction so the helper honors its configured retry budget.

Focus Mode

Start

src/retry.js

Likely area

src/retry.js

Progressive hints

Hints reveal broad direction first, then narrow toward the suspect path without showing hidden tests or exact solution code.

TopicReliability

DifficultyEasy

Est. time15 min

Workspacecreating

Explorer

Preparing workspace files…

Evidence Map

Failing signal loaded from challenge API
Workspace files loaded from workspace API
Results rendered only after API run/submit

Autosaved

workspace

Outputread-onlyready$ workspace boot

Workspace booting...