We should print the size of DH keysizes encountered when we throw exceptions in related code.

sun/security/ssl/ServerHandshaker.java :

136            try {
137                customizedDHKeySize = Integer.parseUnsignedInt(property);
138                if (customizedDHKeySize < 1024 || customizedDHKeySize > 2048) {
139                    throw new IllegalArgumentException(
140                        "Customized DH key size should be positive integer " +
141                        "between 1024 and 2048 bits, inclusive");
142                }
143            } catch (NumberFormatException nfe) {
144                throw new IllegalArgumentException(
145                        "Invalid system property jdk.tls.ephemeralDHKeySize");
146            }

sun/security/pkcs11/P11KeyPairGenerator.java
281                    if ((keySize != 2048) &&
282                        ((keySize > 1024) || ((keySize & 0x3f) != 0))) {
283                        throw new InvalidAlgorithmParameterException(algorithm +
284                            " key must be multiples of 64 if less than 1024 bits" +
285                            ", or 2048 bits");