XmlSchema.Read给出了COMException"灾难性的失败"

时间:2014-05-12 07:53:34

标签: .net debugging com

我有一个实用程序类,其中包含一些与XML模式相关的方法。没有任何代码更改,也没有任何已知的环境变化,它突然开始系统地失败。

失败的方法:

public static XmlSchema GetSchema(string xsdFileName)
{
    string path = MyConfiguration.XmlSchemaLocation;
    if (!path.EndsWith(@"\"))
    {
        path += @"\";
    }

    path += xsdFileName;
    return XmlSchema.Read(File.OpenRead(path), null);
}

堆栈跟踪显示XmlSchema.Read在内部尝试构造一个Parser对象,并且其构造函数尝试读取某些配置,这反过来导致一些策略证据被检查,然后它被COMException爆炸有一个错误代码,如果我理解正确的话,提供的信息不会比错误意外!

以下是例外:

System.Runtime.InteropServices.COMException (0x8000FFFF): Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
   at System.Security.Policy.PEFileEvidenceFactory.GetLocationEvidence(SafePEFileHandle peFile, SecurityZone& zone, StringHandleOnStack retUrl)
   at System.Security.Policy.PEFileEvidenceFactory.GenerateLocationEvidence()
   at System.Security.Policy.PEFileEvidenceFactory.GenerateEvidence(Type evidenceType)
   at System.Security.Policy.AssemblyEvidenceFactory.GenerateEvidence(Type evidenceType)
   at System.Security.Policy.Evidence.GetHostEvidenceNoLock(Type type)
   at System.Security.Policy.Evidence.GetHostEvidence(Type type, Boolean markDelayEvaluatedEvidenceUsed)
   at System.Security.Policy.AppDomainEvidenceFactory.GenerateEvidence(Type evidenceType)
   at System.Security.Policy.Evidence.GetHostEvidenceNoLock(Type type)
   at System.Security.Policy.Evidence.RawEvidenceEnumerator.MoveNext()
   at System.Security.Policy.Evidence.EvidenceEnumerator.MoveNext()
   at System.Configuration.ClientConfigPaths.GetEvidenceInfo(AppDomain appDomain, String exePath, String& typeName)
   at System.Configuration.ClientConfigPaths.GetTypeAndHashSuffix(AppDomain appDomain, String exePath)
   at System.Configuration.ClientConfigPaths..ctor(String exePath, Boolean includeUserConfig)
   at System.Configuration.ClientConfigPaths.GetPaths(String exePath, Boolean includeUserConfig)
   at System.Configuration.ClientConfigurationHost.RequireCompleteInit(IInternalConfigRecord record)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
   at System.Configuration.ConfigurationManager.GetSection(String sectionName)
   at System.Xml.Schema.Parser..ctor(SchemaType schemaType, XmlNameTable nameTable, SchemaNames schemaNames, ValidationEventHandler eventHandler)
   at System.Xml.Schema.XmlSchema.Read(XmlReader reader, ValidationEventHandler validationEventHandler)
   at MyProj.Common.XSDValidator.GetSchema(String xsdFileName)
   at ...

知道如何进一步调查吗?有谁知道可能导致这种情况发生的事情(例如,正在执行该进程的身份的损坏的用户配置文件)?

这发生在生产环境中,我真的不知道如何弄清楚导致它的原因,或者解决它。

如果相关:代码托管在控制台应用程序中。请注意,代码在爆炸前不久就成功访问了配置。 (“MyConfiguration”类是另一个实用程序类,它基本上是一个封装了一堆使用普通System.Configuration.ConfigurationManager类的appSettings键的薄层。)

Windows版本:

OS Name:                   Microsoft® Windows Server® 2008 Datacenter
OS Version:                6.0.6002 Service Pack 2 Build 6002
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free

1 个答案:

答案 0 :(得分:2)

该程序正在通过任务计划程序执行。失败的实例在最小的priveliges下运行。

我认为一个具有合理描述的SecurityException会更有意义,但是一旦将计划任务配置为更加有效的过程运行,问题就会消失。