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Klarna users are being signed in to random accounts

(twitter.com)
475 points danielstocks | 4 comments | 27 May 21 10:28 UTC | HN request time: 0.216s | source
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K0nserv ◴[27 May 21 11:01 UTC] No.27301456[source]▶
I suspect this might be request threading/confusion[0] issue similar to the one GitHub experienced a while back. This would explain why seemingly random user data is being returned.

0: https://github.blog/2021-03-18-how-we-found-and-fixed-a-rare...

replies(2): >>27301479 #>>27301557 #
1. corroclaro ◴[27 May 21 11:12 UTC] No.27301557[source]▶
IIRC, Klarna is mostly written in Erlang, Scala and some parts in Clojure.

If someone should be aware of thread-local storage and its implication it ought to be them.

replies(3): >>27301582 #>>27301808 #>>27303224 #
2. K0nserv ◴[27 May 21 11:16 UTC] No.27301582[source]▶
I was under the impression that they had switched to Java more in recent years
3. def_true_false ◴[27 May 21 11:41 UTC] No.27301808[source]▶
Using trendy tech doesn't solve much by itself. Especially if you can't (or don't) compete with FAANG on compensation.
4. sidebits ◴[27 May 21 14:01 UTC] No.27303224[source]▶
This has changed many years ago.