FULL PRODUCT VERSION :
A DESCRIPTION OF THE PROBLEM :
Some protocols of new sites use DHParameterSpec to the 4096-bit
for example ripple.com
Sun's JCE implementation imposes an artificial restriction on Diffie-Hellman primes. When passing a DHParameterSpec generated with a 4096-bit long modulus, class DHKeyPairGenerator will throw an exception indicating that "Prime size must be multiple of 64, and can only range from 512 to 2048 (inclusive)."
Please allow for module sizes beyond the 2048-bit limit.
The same problem has been fixed in redhat:
This bug can be reproduced always.