【发布时间】：2010-10-17 09:38:17
【问题描述】：
我有一个简单的 Web 服务，允许应用程序查询我的 CMDB。我遇到问题的功能适用于较小的结果集，但在较大的结果集上失败，这表明 WCF 服务配置中的某些内容阻止了它成功。
我有一个简单的 WinForms 测试应用程序，其中包含对 Web 服务的服务引用和调用相关函数的单个函数。
较小的结果集返回 ~120KB 的 xml，失败的较大结果集约为 2MB。我尝试增加 maxReceivedMessageSize 和 maxStringContentLength 的大小但没有成功。
我错过了一些配置吗？如果这是问题所在，我会期待更详细的错误消息。
提前致谢，
尼克
返回的错误是：
System.ServiceModel.CommunicationException: The underlying connection was closed: The connection was closed unexpectedly. --->
System.Net.WebException: The underlying connection was closed: The connection was closed unexpectedly.
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---
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.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
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 TestRig.CmdbDataService.ICmdbDataService.GetMonitors(String client)
at TestRig.CmdbDataService.CmdbDataServiceClient.GetMonitors(String client) in C:\Documents and Settings\nfoster\My Documents\Visual Studio Projects\Virtual Operations Manuals\Trunk\src\TestRig\Service References\CmdbDataService\Reference.vb:line 1480
at TestRig.Form1.btnGetServers_Click(Object sender, EventArgs e) in C:\Apps\Virtual Operations Manuals\Trunk\src\TestRig\Form1.vb:line 8
应用程序中的调用函数是：
Private Sub btnGetMonitors_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGetMonitors.Click
txtResults.Text = String.Empty
Dim proxy As CmdbDataService.CmdbDataServiceClient = Nothing
Try
proxy = New CmdbDataService.CmdbDataServiceClient("WSHttpBinding_ICmdbDataService")
Dim monitors As TestRig.CmdbDataService.ConfigurationItems = proxy.GetMonitors(txtClientName.Text)
proxy.Close()
For Each monitor In monitors
txtResults.Text &= monitor.Name & " (" & monitor.TypeName & ")" & vbCrLf
Next
txtResults.Text &= monitors.Count & " monitors returned"
Catch ex As Exception
If Not IsNothing(proxy) AndAlso proxy.State <> ServiceModel.CommunicationState.Closed Then proxy.Abort()
txtResults.Text = ex.ToString
Finally
proxy = Nothing
End Try
End Sub
在测试台端，app.config 包含以下 serviceModel：
<system.serviceModel>
<diagnostics>
<messageLogging logMalformedMessages="true" logMessagesAtServiceLevel="true"
logMessagesAtTransportLevel="true" />
</diagnostics>
<behaviors />
<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_Default" closeTimeout="00:05:00"
openTimeout="00:05:00" receiveTimeout="00:10:00" sendTimeout="00:05:00"
maxBufferPoolSize="104857600" maxReceivedMessageSize="104857600">
<readerQuotas maxDepth="104857600" maxStringContentLength="104857600"
maxArrayLength="104857600" maxBytesPerRead="104857600" maxNameTableCharCount="104857600" />
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost/CmdbServices/DataService.svc/soap12"
binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_Default"
contract="CmdbDataService.ICmdbDataService" name="WSHttpBinding_ICmdbDataService">
<identity>
<userPrincipalName value="MyMachine\ASPNET" />
</identity>
</endpoint>
</client>
</system.serviceModel>
在服务端，web.config 是：
<system.serviceModel>
<diagnostics performanceCounters="Default">
<messageLogging logMalformedMessages="true" logMessagesAtServiceLevel="true"
logMessagesAtTransportLevel="true" />
</diagnostics>
<services>
<service behaviorConfiguration="ServiceBehavior" name="MyCorp.Cmdb.Services.DataService.CmdbDataService">
<endpoint address="soap12" binding="wsHttpBinding" contract="MyCorp.Cmdb.Services.DataService.ICmdbDataService" />
<endpoint address="soap11" binding="basicHttpBinding" contract="MyCorp.Cmdb.Services.DataService.ICmdbDataService" />
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="ServiceBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
【问题讨论】：
-
我会尝试增加超时值。