在Hibernate中,为什么在没有对此类进行任何更改时,我会找到相同集合的两个表示

Question

我使用的Hibernate版本4.3.11与H2 database版本1.3.172

所以客户得到这个例外(从未有过)

Found two representations of same collection: com.jthink.songlayer.Song.coverArts
org.hibernate.HibernateException: Found two representations of same collection: com.jthink.songlayer.Song.coverArts
at org.hibernate.engine.internal.Collections.processReachableCollection(Collections.java:170)
at org.hibernate.event.internal.FlushVisitor.processCollection(FlushVisitor.java:59)
at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:121)
at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:82)
at org.hibernate.event.internal.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:76)
at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:172)
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:231)
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:102)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:55)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1258)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:425)
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177)
at com.jthink.songkong.ituneshelper.WindowsUpdateItunesWithChanges.analyseFiles(WindowsUpdateItunesWithChanges.java:296)
at com.jthink.songkong.ituneshelper.WindowsUpdateItunesWithChanges.updateItunes(WindowsUpdateItunesWithChanges.java:175)
at com.jthink.songkong.ituneshelper.UpdateItunesWithChanges.call(UpdateItunesWithChanges.java:185)
at com.jthink.songkong.ituneshelper.UpdateItunesWithChanges.call(UpdateItunesWithChanges.java:33)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown S

我知道这可能有很多原因,但奇怪的是当我提交事务时会发生这种情况,在特定的hibernate会话期间我只加载一个类,我从来没有真正对这个特定类进行任何更改

我的Song班级有这个链接到'coverArts'

 @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.ALL})
    private List<CoverArt> coverArts;

CoverArt类是

package com.jthink.songlayer;


import org.hibernate.envers.Audited;

import javax.persistence.*;

    /**
     * Links between a song and the artwork for that song.
     */
    @Audited
    @Entity
    public class CoverArt
    {
        private String  imageType;
        private String  description;

        @OneToOne
        private CoverImage coverImage;

        public CoverArt()
        {

        }

        @Id
        @GeneratedValue
        private Integer id;

        @Version
        private int version;

        public String getImageType()
        {
            return imageType;
        }

        public void setImageType(String imageType)
        {
            this.imageType = imageType;
        }

        public String getDescription()
        {
            return description;
        }

        public void setDescription(String description)
        {
            this.description = description;
        }

        public CoverImage getCoverImage()
        {
            return coverImage;
        }

        public void setCoverImage(CoverImage coverImage)
        {
            this.coverImage = coverImage;
        }
    }