javamcsapi ColumnStoreBulkInsert can't manually be garbage collected

import com.mariadb.columnstore.api.*;

public class MCSAPITest {

        public static void main(String[] args) {

        ColumnStoreDriver d = new ColumnStoreDriver();

		for(int i=0; i<Integer.MAX_VALUE; i++){

			ColumnStoreBulkInsert b = d.createBulkInsert("test", "garbage_test", (short)0, 0);

			try{

				b.setColumn(0, i);

				b.setColumn(1, Integer.MAX_VALUE-i);

				b.writeRow();

				b.commit();

			} catch(ColumnStoreException e){

				b.rollback();

				e.printStackTrace();

			} finally{

			  b.delete();

			}

		}

    }

}