Hibernate搜索问题 - 无法初始化代理 - 没有会话

Question

使用hibernate添加新记录时出现以下异常。我也在使用Hibernate搜索来创建索引。

这是我的例外。

Jun 11, 2009 1:01:23 PM org.hibernate.LazyInitializationException <init>
SEVERE: could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.unproxy(DocumentBuilderIndexedEntity.java:505)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:397)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:456)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:456)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.getDocument(DocumentBuilderIndexedEntity.java:386)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.createAddWork(DocumentBuilderIndexedEntity.java:334)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.addWorkToQueue(DocumentBuilderIndexedEntity.java:302)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.addWorkToBuilderQueue(BatchedQueueingProcessor.java:153)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.processWorkByLayer(BatchedQueueingProcessor.java:140)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.prepareWorks(BatchedQueueingProcessor.java:128)
    at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.beforeCompletion(PostTransactionWorkQueueSynchronization.java:40)
    at org.hibernate.transaction.JDBCTransaction.notifyLocalSynchsBeforeTransactionCompletion(JDBCTransaction.java:274)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:140)
    at com.tis.purchasedetails.dao.PurchaseDetailsDAO.savePurchaseDetails(PurchaseDetailsDAO.java:422)
    at com.tis.purchasedetails.presentation.PurchaseItemsAction.execute(PurchaseItemsAction.java:56)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Unknown Source)
Jun 11, 2009 1:01:23 PM org.hibernate.transaction.JDBCTransaction notifyLocalSynchsBeforeTransactionCompletion
SEVERE: exception calling user Synchronization
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.unproxy(DocumentBuilderIndexedEntity.java:505)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:397)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:456)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:456)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.getDocument(DocumentBuilderIndexedEntity.java:386)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.createAddWork(DocumentBuilderIndexedEntity.java:334)
    at org.hibernate.search.engine.DocumentBuilderIndexedEntity.addWorkToQueue(DocumentBuilderIndexedEntity.java:302)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.addWorkToBuilderQueue(BatchedQueueingProcessor.java:153)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.processWorkByLayer(BatchedQueueingProcessor.java:140)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.prepareWorks(BatchedQueueingProcessor.java:128)
    at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.beforeCompletion(PostTransactionWorkQueueSynchronization.java:40)
    at org.hibernate.transaction.JDBCTransaction.notifyLocalSynchsBeforeTransactionCompletion(JDBCTransaction.java:274)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:140)
    at com.tis.purchasedetails.dao.PurchaseDetailsDAO.savePurchaseDetails(PurchaseDetailsDAO.java:422)
    at com.tis.purchasedetails.presentation.PurchaseItemsAction.execute(PurchaseItemsAction.java:56)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Unknown Source)
Jun 11, 2009 1:01:23 PM org.hibernate.annotations.common.AssertionFailure <init>
SEVERE: an assertion failure occured (this may indicate a bug in Hibernate)
org.hibernate.annotations.common.AssertionFailure: Access a Sealed WorkQueue which has not been sealed
    at org.hibernate.search.backend.WorkQueue.getSealedQueue(WorkQueue.java:47)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.performWorks(BatchedQueueingProcessor.java:170)
    at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.afterCompletion(PostTransactionWorkQueueSynchronization.java:46)
    at org.hibernate.transaction.JDBCTransaction.notifyLocalSynchsAfterTransactionCompletion(JDBCTransaction.java:289)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:152)
    at com.tis.purchasedetails.dao.PurchaseDetailsDAO.savePurchaseDetails(PurchaseDetailsDAO.java:422)
    at com.tis.purchasedetails.presentation.PurchaseItemsAction.execute(PurchaseItemsAction.java:56)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Unknown Source)
Jun 11, 2009 1:01:23 PM org.hibernate.transaction.JDBCTransaction notifyLocalSynchsAfterTransactionCompletion
SEVERE: exception calling user Synchronization
org.hibernate.annotations.common.AssertionFailure: Access a Sealed WorkQueue which has not been sealed
    at org.hibernate.search.backend.WorkQueue.getSealedQueue(WorkQueue.java:47)
    at org.hibernate.search.backend.impl.BatchedQueueingProcessor.performWorks(BatchedQueueingProcessor.java:170)
    at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.afterCompletion(PostTransactionWorkQueueSynchronization.java:46)
    at org.hibernate.transaction.JDBCTransaction.notifyLocalSynchsAfterTransactionCompletion(JDBCTransaction.java:289)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:152)
    at com.tis.purchasedetails.dao.PurchaseDetailsDAO.savePurchaseDetails(PurchaseDetailsDAO.java:422)
    at com.tis.purchasedetails.presentation.PurchaseItemsAction.execute(PurchaseItemsAction.java:56)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Unknown Source)
- INFO Save PurchaseDetailsVO Ends.
- INFO Getting all PurchaseDetails List Using Hibernate Search Starts...

Answer 1

此错误意味着您尝试访问延迟加载的属性或集合，但hibernate会话已关闭。 Hibernate中的延迟加载意味着在代码中访问属性/集合之前，不会填充对象（通过数据库查询）。 Hibernate通过创建一个动态代理对象来实现这一点，该对象仅在您第一次使用该对象时才会访问数据库。为了实现这一点，您的对象必须在整个生命周期中附加到一个打开的Hibernate会话。检查您是如何管理会话的。如果在其他地方关闭会话，您可能需要将对象重新附加到新会话。

Answer 2

http://www.grails.org/doc/latest/ref/Domain%20Classes/attach.html sais：

附

<强>目的

将分离的域实例附加到绑定到当前线程的Hibernate会话

<强>实施例

def b = Book.get（1）
b.title =“Blah”
b.save（冲洗：真）
b.discard（）

...
if（！b.isAttached（））{
    b.attach（）
}

<强>描述

Grails使用Hibernate来管理持久性会话中的每个持久对象。每个请求都会创建一个新会话，并在请求结束时关闭。如果从会话中读取对象并将其置于Web范围（例如HttpSession）中，则会将其视为已分离，因为持久性会话已关闭。您可以使用attach（）方法将现有持久性实例重新附加到当前请求的持久性会话。

Answer 3

除非另有说明，否则Hibernate 3.0+会懒得加载收藏....

此外，除非另有说明，否则hibernate将在执行期间管理自己的会话，在您的情况下，是一个Web应用程序请求...它会关闭并打开新会话，因为它认为合适。因此，检索父级的会话可能与要求检索子级的会话不同。

您可以将OpenSessionInView模式应用于请求，以在整个请求中保留单个会话（重用）。有多种方法可以应用模式：作为一个Filter（Spring的OpenSessionInViewFilter），作为一个拦截器（Spring的OpenSessionInViewInterceptor），显然是作为一个webflow监听器（Spring的HibernateFlowExecutionListener），或者自己在代码中自己应用它来启动整个混乱。

其他方法： 关闭延迟加载（！）， 主动加载对象图：Hibernate.initialize（collection）