Question

I have a ASP.NET application that does text to speech TTS. The code works fine on local machine but when I deploy it on windows 2008 R2 server Enterprise 64 bit, the application pool just crashes. The application is made of v4.0 .NET framework. I am using IIS 7 on server. Below is the error when application pool crashes.

Service Unavailable

HTTP Error 503. The service is unavailable.

Here is the code which should I added ealier

        MemoryStream ms = new MemoryStream();

        context.Response.ContentType = "audio/wav";

        Thread t = new Thread(() =>
        {
            SpeechSynthesizer ss = new SpeechSynthesizer();
            ss.SetOutputToWaveStream(ms);
            ss.Speak(context.Request.QueryString["tts"]);
        });
        t.Start();

        t.Join();
        ms.Position = 0;
        ms.WriteTo(context.Response.OutputStream);
        context.Response.End();

Any help will be appreciated

Thanks

Here is more details of Exception

An unhandled exception occurred and the process was terminated.

Application ID: /LM/W3SVC/17/ROOT

Process ID: 5340

Exception: System.UnauthorizedAccessException

Message: Retrieving the COM class factory for component with CLSID {A832755E-9C2A-40B4-89B2-3A92EE705852} failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).

StackTrace:    at System.Speech.Internal.Synthesis.VoiceSynthesis.Speak(Prompt prompt)
   at System.Speech.Synthesis.SpeechSynthesizer.Speak(Prompt prompt)
   at TTS.<>c__DisplayClass3.<ProcessRequest>b__0()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

I have given full permission to IIS_USRS to file C:\Program Files (x86)\Microsoft Speech SDK 5.1\Bin\TTSEng.dll. Now the error has changed to

An unhandled exception occurred and the process was terminated.

Application ID: /LM/W3SVC/17/ROOT

Process ID: 2816

Exception: System.InvalidOperationException

Message: No voice installed on the system or none available with the current security setting.

StackTrace:    at System.Speech.Internal.Synthesis.VoiceSynthesis.Speak(Prompt prompt)
   at System.Speech.Synthesis.SpeechSynthesizer.Speak(Prompt prompt)
   at TTS.<>c__DisplayClass3.<ProcessRequest>b__0()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

I dont have any sound device on my server. Is this exception correct?

Answer 1

Try following

1. Is IIS running
2. Default website running
3. App pool and ASP.Net version
4. Access is appropriate