title: Cannot be cast to java.util.List error while doing caching
body: <p>I am doing a simple caching in my springboot application. Here I am trying to perform findall,delete and update operations with JPA. At the same time I am trying to update my cache also after performing each operations.</p>
  
  <p>This is my entity</p>
  
  <pre><code>@Entity
  @Table(name = "cars")
  public class Cars implements Serializable{
  
  
      @Id
      @Column(name = "carId")
      private long carId;
  
      @Column(name = "name")
      private String name;
      ..........getters and setters.......
  </code></pre>
  
  <p>This is my service </p>
  
  <pre><code>@Service
  public class CarServiceImpl  implements CarService{ 
      @Autowired
      private CarRepository carRepo;
  
      @Override
      @Transactional
      @Cacheable(value = "cars")
      public Cars save(Cars car) {
          // TODO Auto-generated method stub
          System.out.println("reciving from DB for save");
          return carRepo.save(car);
      }
  
      @Override
      @Transactional
      @CacheEvict(value="cars" ,key="#id")
      public void delete(long id) {
          System.out.println("reciving from DB for delete");
          // TODO Auto-generated method stub
          carRepo.deleteById(id);
      }
  
      @Override
      @Transactional
      @CachePut(value="cars",key="#id")
      public Cars update(Cars car,long id) {
          System.out.println("reciving from DB for update");
          // TODO Auto-generated method stub
          return carRepo.save(car);
      }
  
      @Override
      @Transactional
      @Cacheable(value="cars",key="#id")
      public List&lt;Cars&gt; getAll(long id) {
          System.out.println("reciving from DB for show");
          // TODO Auto-generated method stub
          return carRepo.findAll();
      }
  </code></pre>
  
  <p>this is the error I am getting  when I perform update operation to add a new entity  and then call getAll method where it loads from cache .</p>
  
  <pre><code>java.lang.ClassCastException: com.example.springCaching.entity.Cars cannot be cast to java.util.List
      at com.example.springCaching.serviceImpl.CarServiceImpl$$EnhancerBySpringCGLIB$$80d45199.getAll(&lt;generated&gt;) ~[classes/:na]
      at com.example.springCaching.contoller.CarController.show(CarController.java:39) ~[classes/:na]
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161]
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_161]
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_161]
      at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_161]
      at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:798) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.1.14.RELEASE.jar:5.1.14.RELEASE]
      at org.springframework.web.se
  </code></pre>