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Challenging error from one Lync FE - Schedule conference with error "Failed Fetching Meeting Id"

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Hello Everyone, 

We are experiencing a challenging issue not seen anywhere else. When we schedule a conference, sometimes, I saw there was error "Failed Fetching Meeting Id" thrown in ConferenceScheduledCallback. The error might appear 10 out of 1000 conferences.

This is a Lync 2013 Enterprise pool with 2 Lync FE severs. We are using UCMA3.0.  interestingly, the error only complains one Lync front-end server.

       

    ErrorCode=3196,Source=LyncpfFE1.lyncpf.local,Reason=Failed Fetching Meeting Id.

This error does not seem reported anywhere. Does anyone has any clue?

Thank you in advance,

      

None      11/2/2014 7:08:17 AM     CallID::a985d648-a77a-43bf-bfb0-fd720baa139e::conferenceScheduledCallback
---------------------------------------------------------------------------------------------------

Incoming Call Details
---------------------------------------------------------------------------------------------------
IncomingCallId: [a985d648-a77a-43bf-bfb0-fd720baa139e]
IncomingCallState: [Incoming]
IncomingCallConversationId: [ff3a38bc6d8e40879a6da59d728ecc38]
IncomingCallConversationState: [Incoming]
IncomingCallConversationRemoteParticipant: [Name: +9030 - URI: sip:+9030@lyncperf.local;user=phone - Phone URI:  - OtherPhoneURI: tel:+9030]
IncomingCallRemoteEndpointParticipantUri: [sip:+9030@lyncpf.local;user=phone]
IncomingCallRemoteEndpointUri: [sip:LyncpfME.lyncpf.local@lyncpf.local;gruu;opaque=srvr:MediationServer:vR4umC-Q4FWjTmxi-7DVVwAA;grid=7aa56601cd5e498c8c2fefb74b4ce3c5]
IncomingCallRouteSetStatus: [Healthy]

Announcement Call Details
---------------------------------------------------------------------------------------------------
AnnouncementCallId: [UnknownOrLoggedOff]
AnnouncementCall is null

Agent Call Details
---------------------------------------------------------------------------------------------------
AgentCallId: [UnknownOrLoggedOff]
AgentCall is null
AgentSipAddress: []
AgentName: []
CallerName: [+9030]
Endpoint: [sip:LyncpfMiCC.lyncpf.local@lyncpf.local;gruu;opaque=srvr:pf.ucmaconnector:ig764E9311a-FxkjIAHGkAAA]
ConferenceURI: []

Control Conversation Details
---------------------------------------------------------------------------------------------------
ControlConversationID: [UnknownOrLoggedOff]
ControlConversation is null

IncomingConversationDetails
---------------------------------------------------------------------------------------------------
IncomingConversationID: [UnknownOrLoggedOff]
IncomingConversationState: [UnknownOrLoggedOff]

ACD Conference Details
ACDConference is null
---------------------------------------------------------------------------------------------------

CallerB2B Details
---------------------------------------------------------------------------------------------------
CallerB2B is null
---------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------
 - ConferenceFailureException
Microsoft.Rtc.Collaboration.ConferenceFailureException:The operation failed due to a response from the server. For more information, examine the properties on the exception and inner exception. ---> FaultCode=
ResponseCode=500 ResponseText=unexpected
DiagnosticInformation=ErrorCode=3196,Source=LyncpfFE1.lyncpf.local,Reason=Failed Fetching Meeting Id.
Microsoft.Rtc.Signaling.DiagnosticHeader

Microsoft.Rtc.Signaling.PublishSubscribeException:A 500 (unexpected) response was received from the network and the operation failed. See the exception details for more information. ---> ResponseCode=500 ResponseText=unexpected
DiagnosticInformation=ErrorCode=3196,Source=LyncpfFE1.lyncpf.local,Reason=Failed Fetching Meeting Id.
Microsoft.Rtc.Signaling.DiagnosticHeader

Microsoft.Rtc.Signaling.FailureResponseException:A 500 (unexpected) response was received from the network and the operation failed. See the exception details for more information.
   at Microsoft.Rtc.Signaling.SipAsyncResult2`1.ThrowIfFailed()
   at Microsoft.Rtc.Signaling.SipAsyncResultBase2.EndAsyncOperation[TResult](Object owner, IAsyncResult result)
   at Microsoft.Rtc.Signaling.RealTimeEndpoint.EndSendMessage(IAsyncResult result)
   at Microsoft.Rtc.Collaboration.Conferencing.ConferenceAsyncResult`1.CompletionCallback(IAsyncResult result)
Detected at System.Environment.get_StackTrace()
   at Microsoft.Rtc.Signaling.FailureResponseException..ctor(String message, Exception innerException, SipResponseData responseData)
   at Microsoft.Rtc.Signaling.RealTimeException.GetWrappedRealTimeException(String message, SipResponseData responseData, Exception exceptionToWrap)
   at Microsoft.Rtc.Signaling.SipTransactionAsyncResult`1.ProcessFailureResponse(SipResponse response)
   at Microsoft.Rtc.Signaling.SipMessageAsyncResult.ProcessFailureResponse(SipResponse response)
   at Microsoft.Rtc.Signaling.SipTransactionAsyncResult`1.Transaction_ResponseReceived(Object sender, ResponseReceivedEventArgs e)
   at Microsoft.Rtc.Internal.Sip.OutgoingNonInviteTransaction.OnResponseReceived(EventArgs e)
   at Microsoft.Rtc.Internal.Sip.SingleThreadedDispatcherQueue.DispatcherCallback(Object queue)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)


--- End of inner exception stack trace ---
Detected at System.Environment.get_StackTrace()
   at Microsoft.Rtc.Signaling.FailureResponseException..ctor(String message, Exception innerException, SipResponseData responseData)
   at Microsoft.Rtc.Signaling.PublishSubscribeException..ctor(String message, Exception innerException, SipResponseData responseData)
   at Microsoft.Rtc.Collaboration.Conferencing.ConferenceAsyncResult`1.CompletionCallback(IAsyncResult result)
   at Microsoft.Rtc.Signaling.SipAsyncResult2`1.MakeCallback()
   at Microsoft.Rtc.Signaling.SipTransactionAsyncResult`1.MakeCallback()
   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, 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.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)



--- End of inner exception stack trace ---
   at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()
   at Microsoft.Rtc.Signaling.Helper.EndAsyncOperation[T](Object owner, IAsyncResult result)
   at Microsoft.Rtc.Collaboration.ConferenceManagement.ConferenceServices.EndScheduleConference(IAsyncResult result)
   at prairieFyre.Oranda.Routing.MediaProvider.LyncVoiceMediaProvider.CallData.conferenceScheduleCallback(IAsyncResult result) in 1354
Detected at System.Environment.get_StackTrace()
   at Microsoft.Rtc.Collaboration.ConferenceFailureException..ctor(String message, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.ConferenceAsyncResult`1.CreateConferenceFailureExceptionFromCommandResponse(ConferenceCommandResponse commandResponse, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.CreateModifyConferenceAsyncResult.TryProcessResponseCore(SipResponseData responseData, RealTimeException innerException, RealTimeException& exception)
   at Microsoft.Rtc.Collaboration.Conferencing.ConferenceAsyncResult`1.ProcessFailedServiceResponse(FailureResponseException fre)
   at Microsoft.Rtc.Collaboration.Conferencing.ConferenceAsyncResult`1.CompletionCallback(IAsyncResult result)
   at Microsoft.Rtc.Signaling.SipAsyncResult2`1.MakeCallback()
   at Microsoft.Rtc.Signaling.SipTransactionAsyncResult`1.MakeCallback()
   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, 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.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)

Code: 
Failure
Diagnostic information: 
ErrorCode=3196,Source=LyncpfFE1.lyncpf.local,Reason=Failed Fetching Meeting Id.
Microsoft.Rtc.Signaling.DiagnosticHeader

General Reason: 

Reason: 
otherFailure
ConferenceCommandResponse
Microsoft.Rtc.Collaboration.Conferencing.ConferenceServicesCommandResponse





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