@javax.persistence.Entity
@Table(name="task")
public class Task implements Entity<Long>{

    public Long id;
    public Set<Offer> offers;

    @Id
    @Column(name="ID", unique = true, nullable = false)
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

	@OneToMany(fetch = FetchType.LAZY, mappedBy = "task")
    public Set<Offer> getOffers() {
        return offers;
    }

    public void setOffers(Set<Offer> offers) {
        this.offers = offers;
    }
}

@javax.persistence.Entity
@Table(name="offer")
public class Offer implements Entity<Long>{

    public Long id;
    public Task task;

    @Id
    @Column(name="ID", unique = true, nullable = false)
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    @ManyToOne
    @JoinColumn(name = "taskID")
    public Task getTask() {
        return task;
    }

    public void setTask(Task task) {
        this.task = task;
    }
}

    Long id = Long.valueOf(1);
    test= getTaskDao().findOne(id).getOffers();

<ui:repeat value="#{taskMB.test}" var="offer">
#{offer.price}
 </ui:repeat>

The class 'org.hibernate.collection.internal.PersistentSet' does not have the property 'price'.

failed to lazily initialize a collection of role: ... , no session or session was closed

@OneToMany(fetch=FetchType.EAGER, mappedBy = "task")
    public List<Offer> getOffers() {
        return offers;
    }