JPQL hibernate NullPointerException onetomany

Question

我正在使用JPA 1.0。我有这个JPQL查询

public List<IssEntitat> dummySearchActiusByFilter() {        
    Query query = entityManager.createQuery("SELECT e FROM IssEntitat e where e.issEdificisList.issPlantesCollection.id = :pIdPlanta");
    query.setParameter("pIdPlanta",  (long) 3);
    return query.getResultList();
}

有我的entities.java

    public class IssEntitat  implements Serializable { 

 @OneToMany(cascade = CascadeType.ALL, mappedBy = "id")
    private List<IssEdificis> issEdificisList;   

}

public class IssEdificis implements Serializable {

@JoinColumn(name = "ID_ENTITAT", referencedColumnName = "ID_ENTITAT")
    @ManyToOne(optional = false)
    private IssEntitat idEntitat;

@OneToMany(cascade = {CascadeType.ALL}, mappedBy = "idEdifici")    
    private Collection<IssPlantes> issPlantesCollection = new ArrayList<>();

     

}

public class IssPlantes implements Serializable {
 @JoinColumn(name = "ID_EDIFICI", referencedColumnName = "ID_EDIFICI")
    @ManyToOne(cascade = {CascadeType.MERGE, CascadeType.PERSIST}, targetEntity = IssEdificis.class)
    private IssEdificis idEdifici;

}

执行JPQL时，错误是

显示java.lang.NullPointerException     在org.hibernate.hql.ast.tree.DotNode.getColumns（DotNode.java:97）

我想通过planta搜索所有的issEntities。问题是实体关系是issEdificis和IssPlantes之间的一对多