ошибка при вызове метода findAll () в спящем отношении один к одному

Question

1.EmployeeEntity class

@Entity
@Table(name = "Employee")
public class EmployeeEntitys {


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID", unique = true, nullable = false)
    private Integer employeeId;//Integer

    @Column(name = "EMAIL", unique = true, nullable = false, length = 100)
    private String email;

    @Column(name = "FIRST_NAME", unique = false, nullable = false, length = 100)
    private String firstName;

    @Column(name = "LAST_NAME", unique = false, nullable = false, length = 100)
    private String lastName;



     @OneToOne(cascade=CascadeType.ALL)//, fetch=FetchType.EAGER
     private AccountEntity account;

    public EmployeeEntitys() {

    }

    public EmployeeEntitys(Integer employeeId, String email, String firstName, String lastName) {
        super();
        this.employeeId = employeeId;
        this.email = email;
        this.firstName = firstName;
        this.lastName = lastName;

    }



    public Integer getEmployeeId() {
        return employeeId;
    }


    public void setEmployeeId(Integer employeeId) {
        this.employeeId = employeeId;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "EmployeeEntitys [employeeId=" + employeeId + ", email=" + email + ", firstName=" + firstName
                + ", lastName=" + lastName + ", account=" + account + "]";
    }

    public AccountEntity getAccount() {
        return account;
    }

    public void setAccount(AccountEntity account) {
        this.account = account;
    }
}

2.Accountity class: 
package com.dxc.OneToOne.Bidirectional;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

@Entity
@Table(name = "ACCOUNT")
public class AccountEntity 
{


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ACCOUNT_ID", unique = true, nullable = false)
    private Integer accountId;

    @Column(name = "ACC_NUMBER", unique = true, nullable = false, length = 100)
    private String accountNumber;

    @OneToOne(mappedBy = "account",cascade=CascadeType.ALL)// fetch = FetchType.EAGER
    private EmployeeEntitys employee;


    public AccountEntity() {

    }


    public AccountEntity(Integer accountId, String accountNumber) {
        super();
        this.accountId = accountId;
        this.accountNumber = accountNumber;

    }


    public EmployeeEntitys getEmployee() {
        return employee;
    }

    public void setEmployee(EmployeeEntitys employee) {
        this.employee = employee;
    }

    public Integer getAccountId() {
        return accountId;
    }

    public void setAccountId(Integer accountId) {
        this.accountId = accountId;
    }

    public String getAccountNumber() {
        return accountNumber;
    }

    public void setAccountNumber(String accountNumber) {
        this.accountNumber = accountNumber;
    }
}

Я создал два вышеупомянутых класса сущностей, и мой сервер работал нормально, и я использую базу данных h2, и я могу сохранить данные с помощью CurdRepository, но всякий раз, когда я используя метод findAll (), он дает приведенную ниже ошибку

в com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind -2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9 .5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind .ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser. std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [ jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9. 5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml. jackson.databi nd.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer. serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson- databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson. databind.ser.BeanSe rializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [ jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5. jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com .faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] в com.faster xml. jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] в com.faster xml .jackson.databind.ser.BeanPropertyWriter. serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] в com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson- databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com .faster xml .jackson.databind.ser.BeanSerializer.serialize (BeanSerializer. java: 155) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson. databind.ser.BeanPropertyWriter.serializeAsField (BeanPropertyWriter. java: 727) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.std.BeanSerializerBase. serializeFie lds (BeanSerializerBase. java: 719) ~ [jackson-databind-2.9.5.jar: 2.9.5] на com.faster xml .jackson.databind.ser.BeanSerializ