java.lang.ArithmeticException: BigInteger: modulus not positive

服务器返回验签失败，但是我想了解一下这个异常~ 有遇到过的吗 可以探讨一下~
以下是我找到的一个例子：
Let's see what values of divi are calculated in your loop:

i divi[i] z z divi[i+1]
0 100000000 10 10000000
1 10000000 100 100000
2 100000 1000 100
3 100 10000 0
4 0 100000 0
5 0 1000000 0
6 0 10000000 0
7 0 100000000 0
8 0 1000000000 0
9 0 10000000000 0
And then you try to divide something by divi[4] (= 0), which will obviously fail with the exception you posted.