我得到了第二行的错误。

qlString = "select r FROM Hotspot r "
              + " left outer join fetch r.G1 g1 "
                 + " left outer join fetch r.G2 g2 "
                 + " left outer join fetch r.G3 g3 "
                 + " left outer join fetch r.G4 g4 "
                 + " left outer join fetch r.G5 g5 "
                 +" join r.A a "
                  +" left outer join fetch r.FR rm "
            + "where a.id= :aId";           
query = session.createQuery(qlString);
query.setParameter("aId",lid);
hpts =(List<Hotspot>)query.list();

这是我的hibernate实体类。

@Entity
@Table(name="HOTSPOT")
@NamedQuery(name="Hotspot.findAll", query="SELECT f FROM Hotspot f")
public class Hotspot implements Serializable {
private static final long serialVersionUID = 1L;

@Id
@SequenceGenerator(name="HOTSPOT_ID_GENERATOR", sequenceName="HOTSPOT_SEQ")
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="HOTSPOT_ID_GENERATOR")
private long id;

这是部分堆栈跟踪

org.hibernate.type.SerializationException: could not deserialize
    at org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:243)
    at org.hibernate.internal.util.SerializationHelper.deserialize(SerializationHelper.java:287)
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.fromBytes(SerializableTypeDescriptor.java:138)
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:113)
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:27)
    at org.hibernate.type.descriptor.sql.VarbinaryTypeDescriptor$2.doExtract(VarbinaryTypeDescriptor.java:53)

休眠版本

<dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.0.1.Final</version>
    </dependency>

编辑：用hibernate版本和query更新了问题。