Question

我有一个使用FluentNHibernate的传统WCF服务（沿着EF和存储过程）。这项服务工作了一年多。最近，我们将apppool的回收设置从默认设置更改为每天上午10点进行apppool回收。由于该更改至少两次，我的WCF服务失败并出现以下异常

FluentNHibernate.Cfg.FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.

 ---> FluentNHibernate.Cfg.FluentConfigurationException: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.

 ---> NHibernate.MappingException: Could not configure datastore from input stream (XmlDocument) ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at NHibernate.Cfg.MappingsQueue.GetNextAvailableResource()
   at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name)
   --- End of inner exception stack trace ---
   at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception)
   at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name)
   at NHibernate.Cfg.Configuration.AddDocument(XmlDocument doc, String name)
   at FluentNHibernate.PersistenceModel.Configure(Configuration cfg)
   at FluentNHibernate.Cfg.MappingConfiguration.Apply(Configuration cfg)
   at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration()
  --- End of inner exception stack trace ---
  at FluentNHibernate.Cfg.FluentConfiguration.BuildConfiguration()
  at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()
  --- End of inner exception stack trace ---
  at FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()

一些有趣的事情需要注意

两次，apppool循环后错误已经开始出现，这让我相信这与此密切相关
每次apppool recycle
在我们的apppool recycle设置为IIS默认

这很难在本地重现。我已经查看了关于相同异常的以下SO问题，但它们处于完全不同的背景中，这些问题的作者正在一致地获得该异常，而不是这里的情况

Runtime error when trying to run Fluent NHibernate tutorial example

Fluent nHibernate error - Could not compile the mapping document: (XmlDocument)

Answer 1

经过数小时的调查后，它成了一个尝试创建会话工厂的多线程问题。我本以为NH会话工厂是线程安全的，但遗憾的是它不是，我不得不放入int代码使其成为线程安全的。

FluentNHibernate - 无法从输入流配置数据存储（XmlDocument）

1 个答案: