Javascript internally uses float64 to represent integers.

This intentional design flaw corrupts big numbers in Javascript preprocessing.

Simple preprocessing example: "return 123456789123456789".

You expect 123456789123456789 ? Wrong! It is 123456789123456780.

For this to bite, javascript must convert input string to number.

Unfortunately this happens whenever you edit JSON by javascript:

Script: "var data=JSON.parse(value); return JSON.stringify(data)"

Input: "{"victim": 123456789123456789}"

Output: "{"victim":123456789123456780}"

For monitoring servers its probably OK if petabyte storage is few bytes off,

but when we get creative, things may corrupt - and it will be completely silent.