Lã Văn Thọ ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=60d9710... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZWM1MjU5ZWFk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16484?atlOrigin=eyJpIjoiZWM1Mj... ) HHH-16484 ( https://hibernate.atlassian.net/browse/HHH-16484?atlOrigin=eyJpIjoiZWM1Mj... ) org.hibernate.UnknownEntityTypeException: Unable to locate entity descriptor: com.game.data.core.entity.BaseEntity ( https://hibernate.atlassian.net/browse/HHH-16484?atlOrigin=eyJpIjoiZWM1Mj... ) Change By: Lã Văn Thọ ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=60d9710... ) Hello Guys, I have three class : *BaseEntity, User, DaoCore* {code:java}package com.game.data.core.entity; import jakarta.persistence.*; import lombok.Data; import java.io.Serializable; import java.time.LocalDateTime; @MappedSuperclass @Data public abstract class BaseEntity implements Serializable { @Id    @GeneratedValue(strategy = GenerationType.IDENTITY) protected Integer id;    @Column(name = "created", nullable = false, updatable = false) protected LocalDateTime created;    @Column(name = "updated", nullable = false) protected LocalDateTime updated;    public BaseEntity() { this.created = LocalDateTime.now();        this.updated = LocalDateTime.now();    } @PreUpdate public void preUpdate() { this.updated = LocalDateTime.now(); } }{code} *User* class : {code:java}package com.game.data.core.entity; import jakarta.persistence.Entity; import lombok.Data; @Entity @Data public class User extends BaseEntity { private String username; private String password; }{code} { noformat code:java }// DaoCore Class package com.game.data.core.dao; import com.game.data.core.entity.BaseEntity; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; @Repository public interface DaoCore<T extends BaseEntity,ID extends Integer> extends JpaRepository<T,ID> { }{ noformat code } And AbstractServiceCRUD  : { noformat code:java }package com.game.data.core.base; import com.game.data.core.entity.BaseEntity; import com.game.data.core.dao.DaoCore; import jakarta.transaction.Transactional; import lombok.RequiredArgsConstructor; import lombok.extern.slf4j.Slf4j; import org.springframework.data.domain.Page; import org.springframework.data.domain.Pageable; import org.springframework.stereotype.Service; import java.util.ArrayDeque; @Service @Slf4j(topic = "AbstractServiceCRUD") @Transactional(rollbackOn = RuntimeException.class) @RequiredArgsConstructor public class AbstractServiceCRUD<T extends BaseEntity, ID extends Integer> implements ServiceCore<T, ID> { private final DaoCore<T, ID> daoCore;    @Override    public T save(T bo) { try { log.info("saving data");            return daoCore.save(bo);        } catch (Exception e) { log.error("error saving data", e);            throw new RuntimeException(e);        } } @Override    public T update(T bo, ID id) { try { if (!(id instanceof Integer)) { log.info("id is not instance Integer");                return null;            } boolean isExist = daoCore.existsById(id);            if (isExist) { log.info("updating data with id: {}", id);                bo.preUpdate();                return daoCore.save(bo);            } log.info("data with id: {} not found", id);            return null;        } catch (Exception e) { log.error("error updating data", e);            throw new RuntimeException(e);        } } @Override    public T delete(T bo) { try { ID id = (ID) bo.getId();            if (id != null) { log.info("deleting data with id: {}", id);                daoCore.deleteById(id);                return bo;            } log.info("data with id: {} not found", id);            return null;        } catch (Exception e) { log.error("error deleting data", e);            throw new RuntimeException(e);        } } @Override    public T findById(ID id) { log.info("finding data with id: {}", id);        T bo = daoCore.findById(id).orElse(null);        if (bo != null) { log.info("data with id: {} found", id);            return bo;        } return null;    } @Override    public ArrayDeque<T> findAll() { log.info("finding all data");        return new ArrayDeque<>(daoCore.findAll());    } @Override    public Page<T> findAll(Pageable pageable) { log.info("finding all data with page {} and size {}", pageable.getPageNumber(), pageable.getPageSize());        return daoCore.findAll(pageable);    } } { noformat code } And AbstractControllerCRUD  : { noformat code:java }package com.game.data.core.base; import com.game.data.core.entity.BaseEntity; import lombok.RequiredArgsConstructor; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.Pageable; import org.springframework.web.bind.annotation.*; import java.util.ArrayDeque; @RestController @RequiredArgsConstructor public class AbstractControllerCRUD<T extends BaseEntity, ID extends Integer> implements ServiceCore<T, ID>{ @Autowired    private AbstractServiceCRUD<T, ID> abstractServiceCRUD;    @PostMapping("/insert") @Override    public T save(@RequestBody T bo) { return abstractServiceCRUD.save(bo);    } @PostMapping("/update/{id}") @Override    public T update( @RequestBody T bo,@PathVariable ID id) { return abstractServiceCRUD.update(bo, id);    } @GetMapping("/delete/{id}") @Override    public T delete(@RequestBody T bo) { return abstractServiceCRUD.delete(bo);    } @GetMapping("/find/{id}") @Override    public T findById(@PathVariable ID id) { return abstractServiceCRUD.findById(id);    } @GetMapping("/findAll") @Override    public ArrayDeque<T> findAll() { return abstractServiceCRUD.findAll();    } @GetMapping("/findAllPage") @Override    public Page<T> findAll(@RequestBody Pageable pageable) { return abstractServiceCRUD.findAll(pageable);    } } { noformat code } And class : UserController { noformat code:java }package com.game.data.core.endpoint; import com.game.data.core.base.AbstractControllerCRUD; import com.game.data.core.entity.User; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController@RequestMapping("/api/user") public class UserController extends AbstractControllerCRUD<User,Integer> { }{ noformat code } *When I call to api : /api/user/find/{id} it gives an error :* {color:#bf2600}*org.hibernate.UnknownEntityTypeException: Unable to locate entity descriptor: com.game.data.core.entity.BaseEntity* {color} *If I call API /api/user/insert it still works, please help me, thanks* ( https://hibernate.atlassian.net/browse/HHH-16484#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16484#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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