https://engineering.zalando.com/posts/2025/12/we-hacked-ourselves-so-you-dont-have-to.html
The Day Our Own Queries DoS’ed Us: Inside Zalando Search
Maryna Kryvko, Ivan Potapov
Dec 17, 2025
"On a seemingly ordinary Sunday, our Elasticsearch cluster began to exhibit signs of distress. Queries that usually took milliseconds were now dragging on for seconds..."