in src/main/java/com/aliyun/dts/subscribe/clients/common/BytesUtil.java [288:296]
public static int compareTo(final byte[] left, final byte[] right) {
if (left == null) {
return right == null ? 0 : -1;
} else if (right == null) {
return 1;
}
return UnsignedBytes.lexicographicalComparator().compare(left, right);
}