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POIncreasing WCF Timeout just increases time it takes for client to acknowledge error
 

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  1. POIncreasing WCF Timeout just increases time it takes for client to acknowledge error
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    <p>We have a wcf service that calls a slow server-side method. This method basically creates a file on the server then returns the path so the client can download that file.</p> <p>I know the server method completes as the file gets written to the filesystem, the next line of code simply returns the path to this file.</p> <p>On the client the call obviously gets made but the handler is never invoked, it just sits there until timeout occurs. If I increase the timeout it will just wait longer and just silently fail when the longer timeout incurs. Like I said I can see the remote method is finishing so it isn't actually timing out but somehting is going wrong in the response.</p> <p>One other possibly relevant point is I have other clients that would be making several different requests to the server during this process but I'm unsure if that is relevant or not.</p> <p>Server Config:</p> <pre><code>&lt;behaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="WebServiceBehavior"&gt; &lt;serviceMetadata httpsGetEnabled="true" /&gt; &lt;serviceDebug includeExceptionDetailInFaults="true" /&gt; &lt;dataContractSerializer maxItemsInObjectGraph="2147483647" /&gt; &lt;serviceCredentials&gt; &lt;userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="WebServiceConsumerValidator" /&gt; &lt;/serviceCredentials&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;bindings&gt; &lt;basicHttpBinding&gt; &lt;binding name="WebServiceBinding" maxReceivedMessageSize="2147483647" closeTimeout="01:00:00" openTimeout="01:00:00" receiveTimeout="01:00:00" sendTimeout="01:00:00"&gt; &lt;readerQuotas maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxDepth="2147483647" maxNameTableCharCount="2147483647" maxStringContentLength="2147483647"/&gt; &lt;security mode="TransportWithMessageCredential" &gt; &lt;message clientCredentialType="UserName" /&gt; &lt;transport clientCredentialType="None" proxyCredentialType="None" /&gt; &lt;/security&gt; &lt;/binding&gt; &lt;/basicHttpBinding&gt; &lt;/bindings&gt; &lt;services&gt; &lt;service behaviorConfiguration="WebServiceBehavior" name="AlarmNotifierWebService"&gt; &lt;endpoint address="" binding="basicHttpBinding" contract="IAlarmNotifierWebService" bindingConfiguration="WebServiceBinding"&gt; &lt;identity&gt; &lt;dns value="localhost"/&gt; &lt;/identity&gt; &lt;/endpoint&gt; &lt;endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange"/&gt; &lt;/service&gt; &lt;/services&gt; </code></pre> <p>Client config</p> <pre><code> &lt;bindings&gt; &lt;binding name="LiveManagementWebService" closeTimeout="01:00:00" openTimeout="01:00:00" receiveTimeout="01:00:00" sendTimeout="01:00:00" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"&gt; &lt;readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647"/&gt; &lt;security mode="TransportWithMessageCredential"&gt; &lt;transport clientCredentialType="None" proxyCredentialType="None" realm=""/&gt; &lt;message clientCredentialType="UserName" algorithmSuite="Default"/&gt; &lt;/security&gt; &lt;/binding&gt; &lt;/basicHttpBinding&gt; &lt;/bindings&gt; &lt;behaviors&gt; &lt;endpointBehaviors&gt; &lt;behavior name="myEndpointBehaviour"&gt; &lt;dataContractSerializer maxItemsInObjectGraph="2147483647"/&gt; &lt;/behavior&gt; &lt;/endpointBehaviors&gt; &lt;/behaviors&gt; &lt;client&gt; &lt;endpoint address="https://myserver.com/WebServices/ManagementWebService.svc" binding="basicHttpBinding" bindingConfiguration="LiveManagementWebService" contract="IManagementWebService" name="LiveManagementWebService" behaviorConfiguration="myEndpointBehaviour"/&gt; &lt;/client&gt; </code></pre> <p>Note the maxed out values are because this service returns alot of data in some instances.</p> <p>The calling code:</p> <pre><code>string downloadPath; using (var managementWebServiceClient = new ManagementWebServiceClient(App.ManagementWebServiceClientName)) { managementWebServiceClient.ClientCredentials.UserName.UserName = "username"; managementWebServiceClient.ClientCredentials.UserName.Password = "password"; managementWebServiceClient.Open(); // never gets past the following statement: downloadPath = managementWebServiceClient.BuildFileAndReturnDownloadUrl("someArg1", "someArg2"); managementWebServiceClient.Close(); } //Fetch the file var webClient = new System.Net.WebClient(); webClient.DownloadFile(downloadPath , "filename.sdf"); </code></pre> <p>The aforementioned other clients call different methods but in the same manner. Any suggestions as to where the problem might be? Happy to provide any further information as required.</p>
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    1. COAre you IIS hosted WCF or self? If IIS, have you checked the logs to see which request is causing the issue? Side note: I've been told to avoid `using()` on WCF Proxy Clients.
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      1. USNate
    2. COIs it hanging at Open then?
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      1. USAliostad
    3. COWhat does the WCF trace tell you? You do develop with tracing always turned on, don't you.
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      1. POIncreasing WCF Timeout just increases time it takes for client to acknowledge error
      1. USChris Dickson
 

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