原因org.hibernate.PropertyAccessException：セッター内で例外が発生しました

Question

この例外が発生する原因は何かを見つけることができません。

Request processing failed; nested exception is javax.persistence.PersistenceException: org.hibernate.PropertyAccessException: Exception occurred inside setter of my.Class 

根本的な原因：

javax.persistence.PersistenceException: org.hibernate.PropertyAccessException: Exception occurred inside setter of my.Class 

コード：私は、コンストラクタにタグをinitalize

@ManyToMany(fetch = FetchType.EAGER) 
public void setTags(Set<Tags> tags) { 
    this.tags.clear(); 

    for (Tag tag : tags) { 
     addTag(tag); 
    } 
} 


public boolean addTag(final Tag tag) { 
    if (tags.contains(tag)) { 
     return false; 
    } 

    return tags.add(tag); 
} 

：

tags = new HashSet<Tag>(); 

EDIT

セッターメソッドにログインから

例外：javadocから

ax.persistence.PersistenceException: org.hibernate.PropertyAccessException: Exception occurred inside setter of com.mycompany.domain.Book.Tags 
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387) ~[hibernate-entitymanager-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:838) ~[hibernate-entitymanager-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:781) ~[hibernate-entitymanager-4.2.0.Final.jar:4.2.0.Final] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:201304051638] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:201304051638] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:201304051638] 
    at java.lang.reflect.Method.invoke(Method.java:601) ~[na:1.7.0] 
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) ~[spring-orm-3.1.4.RELEASE.jar:3.1.4.RELEASE] 
    at $Proxy215.find(Unknown Source) ~[na:na] 
    at com.mycompany.persistence.BookJpaRepository.get(BookJpaRepository.java:22) ~[classes/:na] 
    at com.mycompany.service.BookService.getBook(BookService.java:44) ~[classes/:na] 
    at com.mycompany.service.BookService$$FastClassByCGLIB$$d6b91ae6.invoke(<generated>) ~[BookService$$FastClassByCGLIB$$d6b91ae6.class:na] 
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698) ~[spring-aop-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) ~[spring-aop-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) ~[spring-tx-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) ~[spring-aop-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631) ~[spring-aop-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at com.mycompany.service.BookService$$EnhancerByCGLIB$$e6a4e1a3.getBook(<generated>) ~[BookService$$EnhancerByCGLIB$$e6a4e1a3.class:na] 
    at com.mycompany.rest.controller.BookController.getFeedbackForBook(BookController.java:106) ~[classes/:na] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:201304051638] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:201304051638] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:201304051638] 
    at java.lang.reflect.Method.invoke(Method.java:601) ~[na:1.7.0] 
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) ~[spring-web-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) ~[spring-web-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) ~[spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920) [spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816) [spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) [javax.servlet-api.jar:3.0.1] 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801) [spring-webmvc-3.2.1.RELEASE.jar:3.2.1.RELEASE] 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) [javax.servlet-api.jar:3.0.1] 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:175) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardHostValve.__invoke(StandardHostValve.java:161) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) [web-core.jar:3.1.2.1-SNAPSHOT] 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) [kernel.jar:3.1.2.1-SNAPSHOT] 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) [kernel.jar:3.1.2.1-SNAPSHOT] 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) [grizzly-http.jar:1.9.50] 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) [grizzly-http.jar:1.9.50] 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) [grizzly-http.jar:1.9.50] 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) [grizzly-http.jar:1.9.50] 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) [grizzly-http.jar:1.9.50] 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) [grizzly-framework.jar:1.9.50] 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) [grizzly-utils.jar:1.9.50] 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) [grizzly-utils.jar:1.9.50] 
    at java.lang.Thread.run(Thread.java:722) [na:1.7.0] 
Caused by: org.hibernate.PropertyAccessException: Exception occurred inside setter of com.mycompany.domain.Book.Tags 
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:88) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:710) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:371) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:4499) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:185) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:137) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1103) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.processResultSet(Loader.java:960) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.doQuery(Loader.java:910) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:311) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.Loader.loadEntity(Loader.java:2111) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3917) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:460) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:429) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:206) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:262) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:150) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1091) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:174) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2473) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:987) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:807) ~[hibernate-entitymanager-4.2.0.Final.jar:4.2.0.Final] 
    ... 61 common frames omitted 
Caused by: java.lang.reflect.InvocationTargetException: null 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:201304051638] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:201304051638] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:201304051638] 
    at java.lang.reflect.Method.invoke(Method.java:601) ~[na:1.7.0] 
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:65) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    ... 85 common frames omitted 
Caused by: java.lang.NullPointerException: null 
    at org.hibernate.engine.internal.StatefulPersistenceContext.getLoadedCollectionOwnerOrNull(StatefulPersistenceContext.java:859) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.spi.AbstractCollectionEvent.getLoadedOwnerOrNull(AbstractCollectionEvent.java:75) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.event.spi.InitializeCollectionEvent.<init>(InitializeCollectionEvent.java:36) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1846) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:549) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:234) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:124) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180) ~[hibernate-core-4.2.0.Final.jar:4.2.0.Final] 
    at com.mycompany.domain.Book.setTags(Book.java:185) ~[classes/:na] 
    ... 90 common frames omitted 

Answer 1

私の推測では、Hibernateはレイザー読み込みを実装するSet（PersistentSet）の独自の実装でセッターを呼び出し、セッターが呼び出されたときにまだ初期化されていないと思います。このセットのメソッドを呼び出すので、ロード・フェーズ中にセット・ロード自体を行います。これにより、Hibernateは矛盾した状態になります。

プロパティアクセスよりもフィールドアクセスを使用したい（つまり、すべてのマッピングアノテーションをゲッターではなくフィールドに配置する）ことをお勧めします。メソッドが "普通の"コードで呼び出されたときに、渡されたセットのコピーを作成したいが、Hibernate自体がセッターを呼び出すときにそのメソッドを実行したくない場合、レイジーロードを完全に中断する。

Answer 2

：

問題は、反射、またはCGLIB介しによって 永続クラスのインスタンスのプロパティにアクセスが発生しました。

- failure of a security check 
- an exception occurring inside the getter or setter method 
- a nullable database column was mapped to a primitive-type property 
- the Hibernate type was not castable to the property type (or vice-versa) 

含む 可能根本的な原因の数がありますが、私はthis.tags（フィールド）またはtags（パラメータ）nullである、と言うだろうが、それを把握するためには、スタック全体を印刷することができます-trace、tisは根本原因を示します。

Answer 3

これを理解する最も簡単な方法は、setTagsの内部​​をtry catchにラップし、選択したログシステムを使用して例外を記録することです。

私の最初の推測は、タグのインスタンス変数がnullであることです。これが当てはまらない場合は非常に驚いていますが、統合テストでデバッガを使用して検証するのは簡単です

2番目の推測では、setTags（）に渡された引数が正しく初期化されていないため、あなたのforループが反復しようとしたときに何らかの例外をスローしています。

Answer 4

メソッドの引数としてnullを渡すので、for-each構文は例外をスローします。ガード条件を使用し、すべてがOKを行く：

@ManyToMany(fetch = FetchType.EAGER) 
public void setTags(Set<Tags> tags) { 
    this.tags.clear(); 

    if (tags != null) { 
     for (Tag tag : tags) { 
      addTag(tag); 
     } 
    } 
} 

が、私は好む：

@ManyToMany(fetch = FetchType.EAGER) 
public void setTags(Set<Tags> tags) { 
    this.tags = tags; 
}