회귀 문제: 새로운 check_username 속도 제한이 정상적인 가입 흐름을 차단할 수 있음

sam · 9월 10, 2026, 6:48오전

@keegan 님이 2일 전에 이 변경 사항을 병합했습니다.

github.com/discourse/discourse

FIX: Stop `check_username` rate limit from blocking signup (#43316)

main ← fix-check-username-rate-limit

merged 01:10PM - 08 Sep 26 UTC

keegangeorge

+87 -27

**Previously**, `check_username` allowed 10 requests per minute per IP and surfa…ced the "slow down" error inline, so a few username edits during signup (or every keystroke on the username preference page, which had no debounce) could block the form. Anonymous callers could also probe username existence on sites where registration is closed. **In this update**, the limit is raised to 60 per minute and the endpoint fails open when throttled, matching `check_email`, since `create` re-validates on submit. Anonymous requests are refused when new registrations are disabled or DiscourseConnect is enabled, and the username preference input is debounced with a stale-response guard. | Before | After | | --- | --- | | ![before](https://github.com/user-attachments/assets/3a9d613f-fbc8-4af7-94f9-9bb77b027309) | ![after](https://github.com/user-attachments/assets/60da2eec-d98d-4a3e-a0f6-153793c4d7b4) |

이로 인해 문제가 해결되었나요?

글		댓글	조회수
Include username on responses rate-limited by userid Feature	0	121	6월 24, 2024
Username Availability Check Stuck During Registration Support	0	124	9월 16, 2024
Username Not Available when signing up twice, first incompletely Support	8	2371	6월 22, 2018
Username check at account creation doesn't handle CaSe properly Bug	1	866	8월 31, 2016
Check_username api endpoint seems to not work correctly Support	1	1086	2월 27, 2018

회귀 문제: 새로운 check_username 속도 제한이 정상적인 가입 흐름을 차단할 수 있음

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