Spring Data Rest（SDR）的bug？持久实体不能为空

我正在进行一个Spring Data Rest的POC。尝试从存储库中得到可用的JSON。

我有一个实体类（NewTask）

@Entity
@Table(name="newtable")
public class NewTask {

    @Id
    @Column(name="newid")
    private int id;


    @Column(name="newage")
    private int age;

    @Column(name="newaddress")
    private String address;



    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

}

还有一个对应的存储库..

    @RepositoryRestResource
    @PreAuthorize("hasRole('ROLE_ADMIN')")
    public interface NewTaskRepository extends CrudRepository<NewTask, Serializable>{


        @Query("SELECT t.address FROM NewTask t where t.id = :id")
        String findByMyId(@Param("id") int id);

      }         

每当我访问

http://localhost:8080/POCDB/newTasks/search/findByMyId?id=1

我得到以下错误: {"cause":null,"message":"PersistentEntity must not be null!"}

现在这是我的存储库是如何看起来的: 请阅读每个方法的注释

   //Gives- PersistentEntity must not be null!!!
    @Query("SELECT t.address FROM NewTask t where t.id = :id")
    String findByMyId(@Param("id") int id);


    //WORKS FINE
    @Query("SELECT t.id FROM NewTask t where t.id = :id")
    int findId(@Param("id") int id);


    //WORKS FINE
    @Query("SELECT t.id FROM NewTask t where t.id = :id")
    Integer findIdTwo(@Param("id") int id);

    //Gives- PersistentEntity must not be null!!!
    @Query("SELECT t.id FROM NewTask t")
    List<Integer> findIds();

我不确定返回类型有什么问题。我参考了下面的链接以获得一些解决方案：

How does one create a custom query in jparepository but return an object other than the entity?

并且在我的存储库中添加了2个不适用于我的方法

    // returns in some weird format
    @Query("SELECT t.address FROM NewTask t where t.id = :id")
    PString findByMyId(@Param("id") int id);

    //Gives- PersistentEntity must not be null!!!
    @Query("SELECT t.address FROM NewTask t")
    List<PString> findAddress();

我有一种直觉，这是SDR的一个bug，或者我漏掉了什么？