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我正在調用一個我之前製作的WCF服務，該服務查詢語義數據庫並返回dbpedia.org鏈接，這些鏈接都與實體名稱一樣例如，你會發現「http://dbpedia.org/resource/Barack_Obama」或「http://dbpedia.org/resource/Brazil」消費WCF服務時奇怪的異常（可能是字符編碼異常？）
我面臨的問題是，雖然調用返回的方法所提到的URI大多數情況下該方法正常工作，但很少發生此錯誤：
底層連接已關閉：預計將保持活動的連接已被服務器關閉。
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)
我想，也許一些資源有不同的編碼，如「http://dbpedia.org/resource/Sergio_Agüero」爲可能的「U」字的東西？
我在發送之前嘗試對uri進行編碼，它仍會引發相同的異常。
服務配置文件看起來是這樣的：
<?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>
你是否在每個需求後關閉chanel？ –
目前還不清楚，如果問題在於，當您使用特殊字符（「http://dbpedia.org/resource/Sergio_Agüero」）時，您會收到此錯誤，或者您有時會得到此錯誤，並猜測它可能是特殊字符。 – tallseth