Port being used by another application in WCF

Question

I am facing the problem with WCF self hosting application while trying to run with the following configuration:

  <system.serviceModel>
    <services>
      <service name="statisticsCollectingService">
        <endpoint address="net.tcp://localhost:8200/RadioStatistics/"
                binding="netTcpBinding"
                contract="RadioStatistics.Services.IStatisticsCollectingService" />
        <endpoint address="http://localhost:8100/RadioStatistics/"
                binding="basicHttpBinding"
                contract="RadioStatistics.Services.IStatisticsCollectingService" />
      </service>

      <service name="biDataExportService">
        <endpoint address="net.tcp://localhost:8001/RadioStatistics/" 
                  binding="netTcpBinding" 
                  contract="RadioStatistics.Services.IBIDataExportService" />
      </service>
    </services>
  </system.serviceModel>

The exception occurs as follows:

System.Configuration.ConfigurationErrorsException: Error creating context 'spring.root': The process cannot access the file because it is being used by another process ---> Spring.Objects.Factory.ObjectCreationException: Error creating object with name 'statisticsCollectingServiceHost' defined in 'config [C:\TTL\zer_rel_12_1_main_TTL_C1077\TTL\CommonTools\RadioStatistics\bin\Debug\RadioStatistics.ServerApp.vshost.exe.Config#spring/objects] line 4' : Initialization of object failed : HTTP could not register URL http://+:8000/RadioStatistics/services/ because TCP port 8000 is being used by another application. ---> System.ServiceModel.AddressAlreadyInUseException: HTTP could not register URL http://+:8000/RadioStatistics/services/ because TCP port 8000 is being used by another application. ---> System.Net.HttpListenerException: The process cannot access the file because it is being used by another process
   at System.Net.HttpListener.AddAll()
   at System.Net.HttpListener.Start()
   at System.ServiceModel.Channels.SharedHttpTransportManager.OnOpen()
   --- End of inner exception stack trace ---
   at System.ServiceModel.Channels.SharedHttpTransportManager.OnOpen()
   at System.ServiceModel.Channels.TransportManager.Open(TransportChannelListener channelListener)
   at System.ServiceModel.Channels.TransportManagerContainer.Open(SelectTransportManagersCallback selectTransportManagerCallback)
   at System.ServiceModel.Channels.TransportChannelListener.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.HttpChannelListener.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Dispatcher.ChannelDispatcher.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open()
   at Spring.ServiceModel.Activation.ServiceHostFactoryObject.AfterPropertiesSet() in l:\projects\spring-net\trunk\src\Spring\Spring.Services\ServiceModel\Activation\ServiceHostFactoryObject.cs:line 176
   at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InvokeInitMethods(Object target, String name, IConfigurableObjectDefinition definition) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:line 1264
   at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:line 1860
   at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:line 884
   --- End of inner exception stack trace ---
   at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:line 901
   at Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:line 2097
   at Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:li

Running a Windows XP SP3 was already trying to do the following:

httpcfg set urlacl /u http://+:8100/RadioStatistics/ /a "D:(A;;GX;;;BU)"

(with I guess all possible variants of general grants and/or users - like DU (for domain users?)

Also trying to add to the IP list

httpcfg set iplisten -i 0.0.0.0:8100

This was after I've found an event in the event log:

Unable to bind to the underlying transport for 0.0.0.0:8100. The IP Listen-Only list may contain a reference to an interface which may not exist on this machine. The data field contains the error number.

The worst is that it was already working in the past (before I went on holidays few weeks ago). The machine seems unchanged to me as it was not being touched. But the error drives me crazy. The worst thing is that the error occurs regardless the choosen port.

Of cource it works absolutely fine after the basicHttpBinding is removed.

TIA

Roland

Answer 1

You may have something else listening on the same port. Try running

netstat -o -n -a 

to get a list of all the processes and what they are listening for.