我正在调用我之前创建的WCF服务,此服务查询语义数据库并返回dbpedia.org链接,这些链接带有实体的名称,例如,您可以找到“http://dbpedia.org / resource / Barack_Obama“或”http://dbpedia.org/resource/Brazil“
我面临的问题是,在调用返回所提及的URI的方法时,大多数情况下该方法都有效,但很少发生此错误:
底层连接已关闭:服务器已关闭预期保持活动状态的连接。
Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ClientReliableChannelBinder`1.RequestClientReliableChannelBinder`1.OnRequest(TRequestChannel channel, Message message, TimeSpan timeout, MaskingMode maskingMode)
at System.ServiceModel.Channels.ClientReliableChannelBinder`1.Request(Message message, TimeSpan timeout, MaskingMode maskingMode)
at System.ServiceModel.Channels.ClientReliableChannelBinder`1.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Security.SecuritySessionClientSettings`1.SecurityRequestSessionChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at ComparisonServiceInterface.Compare(String[] URIs)
at ComparisonServiceInterfaceClient.Compare(String[] URIs)
Inner Exception:
The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
Inner Exception:
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
Inner Exception:
An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
我认为可能有一些具有不同编码的资源,比如“http://dbpedia.org/resource/Sergio_Agüero”对于'ü'字符可能还是什么?
我在发回之前尝试对uri进行编码,它仍会引发相同的异常。
服务Config文件如下所示:
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
<system.serviceModel>
<services>
<service name="mergedServices.MergedService">
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.RelationGeneratorServiceInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.keywordSearchServiceInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.QAServiceInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.CompareWithOnePredicateServiceInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.ComparisonServiceInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="" binding="wsHttpBinding" contract="mergedServices.ProfileConstructorInterface">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8732/Design_Time_Addresses/mergedServices/" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="False"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
答案 0 :(得分:0)
暂时在故障中包含异常细节,这将允许您获得真正的错误。此外,您应该在重新抛出异常之前记录异常,这样您就可以知道真正的问题是什么而不包括故障中的异常细节。
<serviceDebug includeExceptionDetailInFaults="True"/>