How to solve java.lang.StackOverflowError due to recursion while forming HQL query

I am getting StackOverflowError whenever iterations in loop goes higher. i am writing my logic like this:

public List<Vehicle> seacrhCar(Integer from, SearchDto searchDto,List<String> coveredZipcodes) {

    String q = "from Vehicle where 1=1";
    int i=1;

    if(StringUtils.isNotBlank(searchDto.getFromYear()))
        q+=" and year>='"+StringUtils.replace(searchDto.getFromYear().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getToYear()))
        q+=" and year<='"+StringUtils.replace(searchDto.getToYear().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getManufacturer()))
        q+=" and make='"+StringUtils.replace(searchDto.getManufacturer().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getCarModel()))
        q+=" and model='"+StringUtils.replace(searchDto.getCarModel(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getTrim()))
        q+=" and trim='"+StringUtils.replace(searchDto.getTrim().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getMinPrice()))
        q+=" and priceBaseMsrp>="+searchDto.getMinPrice().trim();

    if(StringUtils.isNotBlank(searchDto.getMaxPrice()))
        q+=" and priceBaseMsrp<="+searchDto.getMaxPrice().trim();

    if(coveredZipcodes.size()>0) {
        q+=" and (";
        for(String zip : coveredZipcodes) {
            q+="zipcode LIKE '%"+zip+"'";
            q+=(i==coveredZipcodes.size())?")":" or ";
            i++;
        }
    }
    q+=" group by vehicle";


    List<Vehicle> vehicles = sessionFactory.getCurrentSession().createQuery(q).setFirstResult(from).setMaxResults(10).setFlushMode(FlushMode.ALWAYS).list();
    return vehicles;

This is the part in above code which is causing problem:

if(coveredZipcodes.size()>0) {
        q+=" and (";
        for(String zip : coveredZipcodes) {
            q+="zipcode LIKE '%"+zip+"'";
            q+=(i==coveredZipcodes.size())?")":" or ";
            i++;
        }
    }

above logic is for searching vehicles from the Vehicle table based on multiple parameter, where one of the parameter is zipcodes. value of zipcodes are coming in a list which needs to be iterated and added to the query. size of zipcodeList (coveredZipcodes) depends on radius(distance) selected by user from his current zipcodes. eg, when a user selects 10 mile radius from his current zipcode, the no of zipcode will be, say 200, and as miles increases so does the no of zipcodes. up to 80-90 miles i am getting no error, but when i am selecting 100 miles or more, it throws StackOverflowError. i understood the problem after some research, but how do i solve this problem?

any help is appreciated.

Thanks!