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POCannot connect to a WCF service hosted in a Worker Role
 

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    <p>I've created a WCF service and hosted it in cloud through a worker role. Unfortunately when I try to connect to the worker role service I get an exception with the message: "No DNS entries exist for host 3a5c0cdffcf04d069dbced5e590bca70.cloudapp.net." 3a5c0cdffcf04d069dbced5e590bca70.cloudapp.net is the address for the worker role deployed in azure staging environment. The workerrole.cs has the following code to expose the WCF service:</p> <pre><code> public override void Run() { using (ServiceHost host = new ServiceHost(typeof(MyService))) { string ip = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["tcppoint"].IPEndpoint.Address.ToString(); int tcpport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["tcppoint"].IPEndpoint.Port; int mexport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["mexinput"].IPEndpoint.Port; // Add a metadatabehavior for client proxy generation // The metadata is exposed via net.tcp ServiceMetadataBehavior metadatabehavior = new ServiceMetadataBehavior(); host.Description.Behaviors.Add(metadatabehavior); Binding mexBinding = MetadataExchangeBindings.CreateMexTcpBinding(); string mexlistenurl = string.Format("net.tcp://{0}:{1}/MyServiceMetaDataEndpoint", ip, mexport); string mexendpointurl = string.Format("net.tcp://{0}:{1}/MyServiceMetaDataEndpoint", RoleEnvironment.GetConfigurationSettingValue("Domain"), 8001); host.AddServiceEndpoint(typeof(IMetadataExchange), mexBinding, mexendpointurl, new Uri(mexlistenurl)); // Add the endpoint for MyService string listenurl = string.Format("net.tcp://{0}:{1}/MyServiceEndpoint", ip, tcpport); string endpointurl = string.Format("net.tcp://{0}:{1}/MyServiceEndpoint", RoleEnvironment.GetConfigurationSettingValue("Domain"), 9001); host.AddServiceEndpoint(typeof(IMyService), new NetTcpBinding(SecurityMode.None), endpointurl, new Uri(listenurl)); host.Open(); while (true) { Thread.Sleep(100000); Trace.WriteLine("Working", "Information"); } } } </code></pre> <p>The tcppoint and mexinput are configured with the ports 8001 and 9001. Also Domain is configured with worker role deployment url:3a5c0cdffcf04d069dbced5e590bca70.cloudapp.net</p> <p>On the client part(a console app), we are using the following configuration in app.config::</p> <p> </p> <pre><code> &lt;bindings&gt; &lt;netTcpBinding&gt; &lt;binding name="NetTcpBinding_IMyService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="524288" maxBufferSize="65536" maxConnections="10" maxReceivedMessageSize="65536"&gt; &lt;readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /&gt; &lt;reliableSession ordered="true" inactivityTimeout="00:50:00" enabled="false" /&gt; &lt;security mode="None"&gt; &lt;transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" /&gt; &lt;message clientCredentialType="Windows" /&gt; &lt;/security&gt; &lt;/binding&gt; &lt;/netTcpBinding&gt; &lt;/bindings&gt; &lt;client&gt; &lt;endpoint address="httpp:\\3a5c0cdffcf04d069dbced5e590bca70.cloudapp.net:9001/MyServiceEndpoint" binding="netTcpBinding" bindingConfiguration="NetTcpBinding_IMyService" contract="ServiceReference1.IMyService" name="NetTcpBinding_IMyService" /&gt; &lt;/client&gt; &lt;behaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="behave"&gt; &lt;serviceMetadata httpGetEnabled="false"/&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;/system.serviceModel&gt; &lt;system.net&gt; &lt;defaultProxy useDefaultCredentials="true"&gt; &lt;proxy autoDetect="False" usesystemdefault="False" bypassonlocal="True" /&gt; &lt;/defaultProxy&gt; </code></pre> <p> </p> <p>The following code is built using the sample code available in msdn as background. Locally it is working fine. Unfortunately when i deploy it to cloud, the exception occurs. Moreover, when i use the virtual ip instead of the url, a connection time out occurs with the exception the remote machine did not respond.</p>
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    1. COWhat does your ServiceDefinition.csdef say? Does it expose external endpoint on port 9001 for the role? It would help if you paste the content of ServiceDefinition.csdef into your question.
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    2. COThe service definition code is given below:: <WorkerRole name="WorkerRole1"> <Endpoints> <InputEndpoint name="tcppoint" protocol="tcp" port="9001" /> <InputEndpoint name="mexinput" protocol="tcp" port="8001" /> </Endpoints> <ConfigurationSettings> <Setting name="Domain" /> </ConfigurationSettings> </WorkerRole>
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