Log4net可以在调试中工作，但在发布版本中失败

Question

我使用log4net已经有一段时间了，所以我对它并不是很陌生。但这是我在Windows Server2008 R2 64位计算机上部署的第一个较大的.NET 4.0解决方案。

当然，我首先搜索了一下，找到了类似的主题。有一个话题听起来很相似-- log4net doesn't log when running a .Net 4.0 Windows application built in Release mode --但我的问题仍然不同。

我的解决方案的一部分是一个利用log4net的控制台应用程序。在我切换到发布版本之前，一切都很好。在我的PC上测试期间，它仍然工作正常。但在服务器端，log4net将不再起作用。

所以我启用了log4net内部调试。这指向了存储库冲突。我从未如此深入地研究过log4net才能完全理解它。但问题似乎是，它首先为域程序集(CRMFacade.Domain)创建一个存储库，然后尝试为控制台应用程序(CRMFacade.DataImport)创建一个存储库。此操作失败，因为默认存储库已存在：

log4net: log4net assembly [log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821]. Loaded from [Global Assembly Cache]. (.NET Runtime [4.0.30319.225] on Microsoft Windows NT 6.1.7601 Service Pack 1)
log4net: DefaultRepositorySelector: defaultRepositoryType [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: Creating repository for assembly [CRMFacade.Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] Loaded From [C:\Program Files (x86)\CRMFacade.DataImport\CRMFacade.Domain.dll]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] does not have a RepositoryAttribute specified.
log4net: DefaultRepositorySelector: Assembly [CRMFacade.Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] using repository [log4net-default-repository] and repository type [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: Creating repository [log4net-default-repository] using type [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: Creating repository for assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] Loaded From [C:\Program Files (x86)\CRMFacade.DataImport\CRMFacade.DataImport.exe]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] does not have a RepositoryAttribute specified.
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] using repository [log4net-default-repository] and repository type [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: repository [log4net-default-repository] already exists, using repository type [log4net.Repository.Hierarchy.Hierarchy]

有趣的是:在Debug build中，控制台应用程序(CRMFacade.DataImport)是log4net为其创建存储库的第一个也是唯一一个程序集。无论哪种情况，CRMFacade.Domain都是在发布版本中。CRMFacade.Domain还从GAC引用log4net，以便发出日志输出。但是它没有log4net配置。这始终由使用域程序集的程序集提供。

很奇怪，因为它仍然在我的本地计算机上的发布版本中工作。

为了完整起见，下面是log4net调试输出，其中一切工作正常：

log4net: log4net assembly [log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821]. Loaded from [Global Assembly Cache]. (.NET Runtime [4.0.30319.225] on Microsoft Windows NT 6.1.7601 Service Pack 1)
log4net: DefaultRepositorySelector: defaultRepositoryType [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: Creating repository for assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] Loaded From [C:\Program Files (x86)\CRMFacade.DataImport\CRMFacade.DataImport.exe]
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] does not have a RepositoryAttribute specified.
log4net: DefaultRepositorySelector: Assembly [CRMFacade.DataImport, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null] using repository [log4net-default-repository] and repository type [log4net.Repository.Hierarchy.Hierarchy]
log4net: DefaultRepositorySelector: Creating repository [log4net-default-repository] using type [log4net.Repository.Hierarchy.Hierarchy]
log4net: XmlConfigurator: configuring repository [log4net-default-repository] using file [C:\Program Files (x86)\CRMFacade.DataImport\CRMFacade.DataImport.exe.Config]
log4net: XmlConfigurator: configuring repository [log4net-default-repository] using stream
log4net: XmlConfigurator: loading XML configuration
log4net: XmlConfigurator: Configuring Repository [log4net-default-repository]
log4net: XmlHierarchyConfigurator: Configuration update mode [Merge].
log4net: XmlHierarchyConfigurator: Logger [root] Level string is [INFO].
log4net: XmlHierarchyConfigurator: Logger [root] level set to [name="INFO",value=40000].
log4net: XmlHierarchyConfigurator: Loading Appender [ConsoleAppender] type: [log4net.Appender.ConsoleAppender]
log4net: XmlHierarchyConfigurator: Setting Property [LevelMin] to Level value [INFO]
log4net: XmlHierarchyConfigurator: Setting Collection Property [AddFilter] to object [log4net.Filter.LevelRangeFilter]
log4net: PatternParser: Converter [message] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: XmlHierarchyConfigurator: Setting Property [ConversionPattern] to String value [%timestamp [%thread] %-5level %type: %message%newline]
log4net: PatternParser: Converter [timestamp] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [ [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [thread] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [] ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [level] Option [] Format [min=5,max=2147483647,leftAlign=True]
log4net: PatternParser: Converter [literal] Option [ ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [type] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [: ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [message] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: XmlHierarchyConfigurator: Setting Property [Layout] to object [log4net.Layout.PatternLayout]
log4net: XmlHierarchyConfigurator: Created Appender [ConsoleAppender]
log4net: XmlHierarchyConfigurator: Adding appender named [ConsoleAppender] to logger [root].
log4net: XmlHierarchyConfigurator: Loading Appender [RollingFileAppender] type: [log4net.Appender.RollingFileAppender]
log4net: XmlHierarchyConfigurator: Setting Property [File] to String value [C:\\Logfiles\\APPS\\Corporate\\CRMFacade\\DataImport\\log.txt]
log4net: XmlHierarchyConfigurator: Setting Property [AppendToFile] to Boolean value [True]
log4net: XmlHierarchyConfigurator: Setting Property [RollingStyle] to RollingMode value [Size]
log4net: XmlHierarchyConfigurator: Setting Property [MaxSizeRollBackups] to Int32 value [10]
log4net: XmlHierarchyConfigurator: Setting Property [MaximumFileSize] to String value [2MB]
log4net: XmlHierarchyConfigurator: Setting Property [StaticLogFileName] to Boolean value [True]
log4net: PatternParser: Converter [message] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: XmlHierarchyConfigurator: Setting Property [ConversionPattern] to String value [%date [%thread] %-5level %logger - %message%newline]
log4net: PatternParser: Converter [date] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [ [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [thread] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [] ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [level] Option [] Format [min=5,max=2147483647,leftAlign=True]
log4net: PatternParser: Converter [literal] Option [ ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [logger] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [literal] Option [ - ] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [message] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: PatternParser: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False]
log4net: XmlHierarchyConfigurator: Setting Property [Layout] to object [log4net.Layout.PatternLayout]
log4net: RollingFileAppender: Searched for existing files in [C:\Logfiles\APPS\Corporate\CRMFacade\DataImport]
log4net: RollingFileAppender: curSizeRollBackups starts at [0]
log4net: FileAppender: Opening file for writing [C:\Logfiles\APPS\Corporate\CRMFacade\DataImport\log.txt] append [True]
log4net: XmlHierarchyConfigurator: Created Appender [RollingFileAppender]
log4net: XmlHierarchyConfigurator: Adding appender named [RollingFileAppender] to logger [root].
log4net: XmlHierarchyConfigurator: Hierarchy Threshold []

Answer 1

如果您下载了最新的log4net代码，请查看Visual Studio2010中项目的log4net Build选项卡。

在调试模式下，编译器符号为NET;NET_2_0;NET_4_0。

在Release模式中，缺少NET_4_0。

在构建发布版本之前，将发布模式中的符号更改为NET;NET_2_0;NET_4_0，应该没有问题。在Windows资源管理器中查看完成的DLL的文件属性。在“详细信息”下，你会看到文件描述是"Apache log4net for .NET Framework4.0“

Answer 2

我们遇到了同样的问题。我仍然不清楚根本原因是什么，但我们又让log4net正常工作了。我们只在使用网站程序集上的XmlConfiguratorAttribute配置log4net的网站中遇到了问题。通过直接从Application_Start()调用XmlConfigurator.Configure()，我们设法解决了这个问题。这不是一个很好的解决方案，但它似乎起作用了。