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A comment on Some DNS lookups causing 5xx errors due to leap second bug. Parent comment

Re:Some DNS lookups causing 5xx errors due to leap second bug by tyingq on Sunday January 01, 2017 @11:18AM (#13296162)
One example might be rate limiting. Count requests over elapsed time. If elapsed time is a negative number, the math might trigger a bug that causes CF to block requests...too many requests over time period X.
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Re:Some DNS lookups causing 5xx errors due to leap second bug by kondbg on Monday January 02, 2017 @08:52PM (#13306042)
Cloudflare posted a post-mortem [1]. They were measuring round trip time, and supplying the result of that into the golang rand.Int63n() function, which panics the process when given a negative number.

[1] https://blog.cloudflare.com/how-and-why-the-leap-second-affe...

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