Windows Azure SDK Compute Emulator Listen Port Unavailable

Symptom: You can encounter this error when you use Microsoft Visual Studio or the CSRun Command-Line Tool to run an application in the Compute Emulator.

When you use Microsoft Visual Studio to run an application, you receive the following error message:

One or more ports used by the Compute Emulator are currently used by other processes. To resolve this, please see MSDN documentation at http://msdn.microsoft.com/en-us/library/hh472164.aspx

When you use the CSRunCommand-Line Tool to run an application, the Compute Emulator attempts to start, but quickly fails. The following message is displayed in the notification area:

When this error occurs, the following message is entered into c:\users\<username>\AppData\Local\dftmp\DevFCLogs:

Exception occurred when trying to open service host. {0}, {1}`There is already a listener on IP endpoint 127.0.0.1: 15095.  Make sure that you are not trying to use this endpoint multiple times in your application and that there are no other applications listening on this endpoint.

Cause: Another service is using a porton which one of the Compute Emulator services is listening.

Resolution:

1. Determine if any of the following ports are being used by a non-Windows service: 15095, 15096, 15097, 15098, 15099, or 15100.
   
   
2. Navigate to the installation directory of the Compute Emulator. By default the Compute Emulator is installed at C:\Program Files\Windows Azure Emulator\emulator\devfabric.
   
   
3. In the DevFc.exe.config file, locate the add port entry that contains the conflicting port value and modify the value to use a non-conflicting port. The DevFc.exe.config file entries that can be affected are:
   
   
   • <add key="ManagementServicePort" value="15095" />
     
     
   • <add key="RepositoryServicePort" value="15096" />
     
     
   • <add key="AgentCallbackPort" value="15097" />
     
     
   • <add key="AgentPort" value="15098" />
     
     
   • <add key="PxeResponderPort" value="15100" />
     
     
4. In the DfService.exe.config file, locate the dfservice element and modify the ManagementServicePort or RepositoryServicePort attribute to use a non-conflicting port.
   
   
   • <dfservice ManagementServicePort="15095" RepositoryServicePort="15096" />
     
     
5. Press F5 to restart the application or run the CSRun Command-Line Tool.
   
   

Symptom:

When you use Microsoft Visual Studio to run an application, you receive the following error message:

Unable to connect to dfService.

When you use the CSRun Command-Line Tool to run an application, the Compute Emulator attempts to start, but quickly fails. The following message is displayed in the notification area:

When this error occurs, the following message is entered into c:\users\<username>\AppData\Local\dftmp\DevFCLogs:

Exception occurred when trying to open service host. {0}, {1}`There is already a listener on IP endpoint 127.0.0.1:12001.  Make sure that you are not trying to use this endpoint multiple times in your application and that there are no other applications listening on this endpoint.

Cause: Another service is using a port that on which one of the Compute Emulator services is listening.

Resolution: To correct the issue:

1. Identify any non-Windows Azure service that is listening on the following ports: 12000, 12001, 12002, 808, 16001, or 15100.
   
   
   
   

   Tip
   For example, VMWare Workstation Server listens on port 12001.

2. Stop the identified service.
   
   
3. Press F5 to restart the application.