Issue with the log data retrieved from mysql db using springboot and hibernate

I am trying to retrieve a log from mysql database using a Springboot REST api but the logs are coming in multiple repetitions instead of just one line. I only have data in one row in my database but when it gets called using the GET, it comes in as repetitive logs. Check the picture to see it:

Below is the code for the entity classes that produced these logs. First one is UserLog:

package com.dafe.spring.applogger.entity;

import java.util.ArrayList;
import java.util.List;

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.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name="log")
public class UserLog {

    //define field

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id")
    private int id;

    @Column(name="user_id")
    private String userId;

    @Column(name="session_id")
    private String sessionId;

    @OneToMany(mappedBy="userLog",cascade=CascadeType.ALL)
        private List<Action>action;
    //define constructors

    public UserLog() {
    	
    }
    
    public UserLog(String userId, String sessionId) {
        this.userId = userId;
        this.sessionId = sessionId;
    }
    //define getters and setters


    public String getUserId() {
        return userId;
    }


    public void setUserId(String userId) {
        this.userId = userId;
    }


    public String getSessionId() {
        return sessionId;
    }


    public void setSessionId(String sessionId) {
        this.sessionId = sessionId;
    }

    public List<Action> getAction() {
        return action;
    }


    public void setAction(List<Action> action) {
        this.action = action;
    }

    @Override
    public String toString() {
        return "Log [userId=" + userId + ", sessionId=" + sessionId + "]";
    }

}

Here is the other entity class Action:

package com.dafe.spring.applogger.entity;

import java.sql.Timestamp;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;


@Entity
@Table(name="action")
public class Action {

    //declare & annotate your fields
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id")
    private int id;

@Column(name="time")
    private Timestamp time;

@Column(name="type")
    private String type;


@ManyToOne
@JoinColumn(name="log_id")
private UserLog userLog;

public Action(int id, Timestamp time, String type, UserLog userLog) {
    this.id = id;
    this.time = time;
    this.type = type;
    this.userLog = userLog;
}

    //create and generate constructor
    public Action() {

    }

    public Action(Timestamp time, String type, UserLog userLog) {
		this.time = time;
		this.type = type;
		this.userLog = userLog;
	}

	//generate getters and setters

	public Timestamp getTime() {
		return time;
	}

	public void setTime(Timestamp time) {
		this.time = time;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public UserLog getUserLog() {
		return userLog;
	}

	public void setUserLog(UserLog userLog) {
		this.userLog = userLog;
	}
    //generate toString 

	@Override
	public String toString() {
		return "Action [time=" + time + ", type=" + type + ", userLog=" + userLog + "]";
	}


}

here is the dao implementation class

package com.dafe.spring.applogger.dao;

import java.util.List;

import javax.persistence.EntityManager;

import org.hibernate.Session;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.dafe.spring.applogger.entity.UserLog;

@Repository
public class UserLogDaoHibernateImplementation implements UserLogDAO {

	
	//define field for entity manager
	private EntityManager entityManager;
	
	//set up constructor injection
	@Autowired
	public UserLogDaoHibernateImplementation(EntityManager theEntityManager) {
	
	entityManager= theEntityManager;
	}
	
	@Override
	public List<UserLog> findAll() {

		//get the current hibernate session from entity manager
		Session currentSession = entityManager.unwrap(Session.class);
		
		
		//create a query
		Query <UserLog> theQuery = 
				currentSession.createQuery("from UserLog", UserLog.class);
		
		//execute query and get result list
		
		List<UserLog> userLog = theQuery.getResultList();
		
		//return the results
		
		return userLog;
	}

	@Override
	public UserLog findById(int theId) {
		
		//get the current session
		Session currentSession = entityManager.unwrap(Session.class);
		
		//get the userLog
		UserLog userLog = 
				currentSession.get(UserLog.class, theId);
		
		
		//return the userLog
		
		return null;
	}

	@Override
	public void save(UserLog theUserLog) {
		//get the current session
		Session currentSession = entityManager.unwrap(Session.class);
	
		//save
	currentSession.saveOrUpdate(theUserLog);
		
	}

	@Override
	public void deleteById(int theId) {
		//get the current hibernate session
				Session currentSession = entityManager.unwrap(Session.class);
			
	//delete object with primary key
				Query theQuery = 
						currentSession.createQuery("delete from log where id=:theuserId");
				
				theQuery.setParameter("theuserId", theId);
				
				theQuery.executeUpdate();
				
	}

} 

and the rest controller

package com.dafe.spring.applogger.rest;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.dafe.spring.applogger.dao.UserLogDAO;
import com.dafe.spring.applogger.entity.UserLog;
// this api selects all the 
@RestController
@RequestMapping("/api")
public class UserLogRestController {
	
	@Autowired
	private UserLogDAO userLogDao;
	
	//inject logDao using constructor injection
		public UserLogRestController(UserLogDAO theUserLogDao) {
		
	}

	//expose logs and return list of logs
	@GetMapping("/userLog")
	public List<UserLog> findAll(){
		
		return userLogDao.findAll();
		
	}
	
}

please help me figure this out. Thanks in advance

I had this issue recently and I have fixed putting this anottation @JsonIgnore
at relationships, you can try if it works for you too

 @JsonIgnore
 @ManyToOne
 @JoinColumn(name="log_id")
 private UserLog userLog;


 @JsonIgnore
 @OneToMany(mappedBy="userLog",cascade=CascadeType.ALL)
 private List<Action>action;