这是我的输入数据文件示例

+-------------+---------+--------+------+------+-----+
|applicationId|firstname|lastname|addres|gender|phone|  
+-------------+---------+--------+------+------+-----+
|           t1|    suraj| ghimire| 10oak|     m| 1111|
|           t2|    Kiran|   Kumar| 5wren|     m| 2222|
|           t3|     sara| chauhan| 15nvi|     f| 6666|
|           t4|    suraj| ghimire| 11oak|     m| 1111|
|           t5|    Kiran|   Kumar| 5wren|     f| 2222|
|           t6|  Prakash|     Jha| 18nvi|     f| 3333|
|           t7|    Kiran|   Kumar| 5wren|     f| 2222|
|           t8|    Suraj| Ghimire| 10oak|     m| 1111|
|           t9|  Prakash|     Jha| 18nvi|     m| 3333|
|          t10|    Kiran|   Kumar| 5wren|     f| 2222|
|          t11|    Suraj| Ghimire| 10oak|     m| 1111|
|          t12|  Prakash|     Jha| 18nvi|     f| 3333|

使用sparkrdd方法，我需要对数据进行分组，并且只打印任何列中出现次数最多的第一条记录，最终输出应该如下所示

+-------------+---------+--------+------+------+-----+
|applicationId|firstname|lastname|addres|gender|phone|  
+-------------+---------+--------+------+------+-----+
|           t3|     sara| chauhan| 15nvi|     f| 6666|
|           t6|  Prakash|     Jha| 18nvi|     f| 3333|
|           t7|    Kiran|   Kumar| 5wren|     f| 2222|
|           t8|    Suraj| Ghimire| 10oak|     m| 1111|