Async Race Condition
An async race happens when overlapping jobs finish in an unexpected order. An older result may overwrite a newer one.
Another example
A slow search for red finishes after a fast search for red shoes. The page ignores the late red result.
Main parts
- 01Overlapping jobs
- 02Current request ID
- 03Late response
- 04Freshness check
- 05Ignored result
Use it when
Guard any screen that can start a new async job before the old one ends.
Do not use it when
Do not assume the first request will finish first. Match the result to the latest request.
Name used in code
request A + request B -> B wins -> ignore A Before you ship
Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback.
Outcome: Use or review Async Race Condition as a technical building block that the team can maintain. User context: A slow search for red finishes after a fast search for red shoes. The page ignores the late red result. Technology or engineering concept: Async Race Condition. Why it fits: Guard any screen that can start a new async job before the old one ends. Do not use it when: Do not assume the first request will finish first. Match the result to the latest request. Engineering fit: Define where it runs and which version to use. Set its job, interfaces, data flow, dependencies, supported systems, security, and speed limits. Explain how it fits the current stack. Lifecycle safeguards: Check dependency health and licenses. Add monitoring and a fallback. Name the upgrade owner. Do not add a second tool for the same job without a measured benefit. Acceptance criteria: A small integration proves the needed behavior. Test compatibility, security, failure, and performance. Document deploy, upgrade, support, and rollback steps. Evidence and limits (evidence boundary): It is official for that source. Other platforms or teams may use the term in another way. Unknowns to confirm: Current stack, runtime and version rules, target systems, dependency owner, performance budget, support period, and migration limits.
Check this request
Review the current use of Async Race Condition. Definition: An async race happens when overlapping jobs finish in an unexpected order. An older result may overwrite a newer one. Release checks: Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.