You need to change your Date object from java.sql.Date to java.util.Date
java.util.Date newDate = new Date(yourSqlDate.getTime());
if you do not know when you used java.sql.Date in your code, I suggest you try checking if there is any Date variable that is an update from the SQL statement.
, Mongo 2.x, , Mongo 3.x, , java.sql.Date.