[router] fix: validate HTTP status codes in health check #12631
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Summary of ChangesHello @wyx-0203, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a critical fix to the router's health check mechanism. Previously, the system could misinterpret the health status of gRPC workers by not thoroughly validating HTTP response codes. The change ensures that only successful HTTP status codes (2xx range) are considered valid, preventing incorrect worker classification and enhancing the reliability of the router's worker management. Highlights
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Code Review
This pull request fixes a bug in the worker health check logic. The change correctly validates the HTTP status code of health check responses by using reqwest::Response::error_for_status. This ensures that only successful (2xx) status codes are considered a sign of a healthy HTTP worker, preventing gRPC workers from being misidentified as HTTP workers. The fix is concise, idiomatic, and effectively addresses the issue described.
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Motivation
Fix [Bug] Router incorrectly detects gRPC workers as HTTP due to incomplete health check validation #12630
Modifications
Validate HTTP status codes in health check.
Accuracy Tests
Benchmarking and Profiling
Checklist