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c# - REGDB_E_CLASSNOTREG 在应用程序池回收后使用 MsgPack Serializer 时

问题描述

我们在 IIS 10 中托管了一个 WCF 服务应用程序。

每次 IIS 在 20 分钟不活动后回收应用程序池时，我们在使用 MsgPack 进行反序列化时会得到以下异常：

The type initializer for 'MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager' threw an exception. System.TypeInitializationException: The type initializer for 'MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager' threw an exception. ---> System.Runtime.InteropServices.COMException: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
   at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(RuntimeAssembly containingAssembly, Boolean emitSymbolInfo, String name, String filename, StackCrawlMarkHandle stackMark, IntPtr& pInternalSymWriter, ObjectHandleOnStack retModule, Boolean fIsTransient, Int32& tkFile)
   at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(RuntimeAssembly containingAssembly, Boolean emitSymbolInfo, String name, String filename, StackCrawlMark& stackMark, IntPtr& pInternalSymWriter, Boolean fIsTransient, Int32& tkFile)
   at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternalNoLock(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark)
   at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternal(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark)
   at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(String name, String fileName, Boolean emitSymbolInfo)
   at MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager..ctor(Boolean isDebuggable, Boolean isCollectable, AssemblyBuilder assemblyBuilder)
   at MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager.Create(Boolean isDebuggable, Boolean isCollectable, AssemblyBuilder assemblyBuilder)
   at MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager..cctor()
   --- End of inner exception stack trace ---
   at MsgPack.Serialization.EmittingSerializers.SerializationMethodGeneratorManager.Get(SerializationMethodGeneratorOption option)
   at MsgPack.Serialization.EmittingSerializers.AssemblyBuilderSerializerBuilder.<>c__DisplayClass63_0.<CreateCodeGenerationContextForSerializerCreation>b__1()
   at MsgPack.Serialization.EmittingSerializers.AssemblyBuilderEmittingContext.get_Emitter()
   at MsgPack.Serialization.EmittingSerializers.AssemblyBuilderEmittingContext.BeginMethodOverride(String name)
   at MsgPack.Serialization.AbstractSerializers.SerializerBuilder`2.BuildObjectPackTo(TContext context, SerializationTarget targetInfo, Boolean isAsync)
   at MsgPack.Serialization.AbstractSerializers.SerializerBuilder`2.BuildObjectSerializer(TContext context)
   at MsgPack.Serialization.AbstractSerializers.SerializerBuilder`2.BuildSerializer(TContext context, Type concreteType, PolymorphismSchema schema, SerializationTarget& targetInfo)
   at MsgPack.Serialization.AbstractSerializers.SerializerBuilder`2.BuildSerializerInstance(SerializationContext context, Type concreteType, PolymorphismSchema schema)
   at MsgPack.Serialization.MessagePackSerializer.CreateInternal[T](SerializationContext context, PolymorphismSchema schema)
   at MsgPack.Serialization.SerializationContext.GetSerializer[T](Object providerParameter)

当我手动回收应用程序池时，问题消失了，一切正常。在发生自动回收事件之前，问题又回来了。

在应用程序使用以下代码启动后，我已经强制所有程序集立即加载到 AppDomain 中：

var assemblies = BuildManager.GetReferencedAssemblies().Cast<Assembly>();

有人知道吗？

标签： c#wcfiisapplication-poolmsgpack

解决方案

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