Ask HN: We just had an actual UUID v4 collision...
421 by mittermayr | 319 comments on Hacker News.
I know what you're thinking... and I still can't believe it, but... This morning, our database flagged a duplicate UUID (v4). I checked, thinking it may have been a double-insert bug or something, but no. The original UUID was from a record added in 2025 (about a year ago), and today the system inserted a new document with a fresh UUIDv4 and it came up with the exact same one: b6133fd6-70fe-4fe3-bed6-8ca8fc9386cd We're using this:
https://ift.tt/hA0jWKt I thought this is technically impossible, and it will never happen, and since we're not modifying the UUIDs in any way, I really wonder how that.... is possible!? We're literally only calling: import { v4 as uuidv4 } from "uuid"; const document_id = uuidv4(); ... and then insert into the database, that's it. Additionally, the database only has about 15.000 records, and now one collision. Statistically... impossible. Has that ever happened to anyone?! What in the...
news
Saturday, 9 May 2026
New best story on Hacker News: A recent experience with ChatGPT 5.5 Pro
A recent experience with ChatGPT 5.5 Pro
543 by _alternator_ | 397 comments on Hacker News.
https://twitter.com/wtgowers/status/2052830948685676605 https://ift.tt/0gMxuZb
543 by _alternator_ | 397 comments on Hacker News.
https://twitter.com/wtgowers/status/2052830948685676605 https://ift.tt/0gMxuZb
Friday, 8 May 2026
New best story on Hacker News: Google broke reCAPTCHA for de-googled Android users
Google broke reCAPTCHA for de-googled Android users
641 by anonymousiam | 225 comments on Hacker News.
Related: Google Cloud fraud defense, the next evolution of reCAPTCHA - https://ift.tt/6jgFPE5 also: Google Cloud Fraud Defence is just WEI repackaged - https://ift.tt/on7dEPx
641 by anonymousiam | 225 comments on Hacker News.
Related: Google Cloud fraud defense, the next evolution of reCAPTCHA - https://ift.tt/6jgFPE5 also: Google Cloud Fraud Defence is just WEI repackaged - https://ift.tt/on7dEPx
Subscribe to:
Posts (Atom)
-
U.S. Postal Service starts nationwide electric vehicle fleet, buying 9,250 EVs 444 by lxm | 336 comments on Hacker News.
-
Learn Postgres at the Playground – Postgres compiled to WASM running in browser 543 by samwillis | 144 comments on Hacker News.
-
NSA, NIST, and post-quantum crypto: my second lawsuit against the US government 486 by trulyrandom | 143 comments on Hacker News.