The underlying connection was closed: A connection that was expected to be kept alive was closed by the server

[mike_meirovitz]

Hi,

We are getting the following error when our SmartConnector Processor are running.

2021-05-18 00:00:13.5074,Error,Processor,<no principal>,UCME Alarm Push Processor,System.ServiceModel.CommunicationException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. ---> System.Net.WebException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---

Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at Ews.Client.IDataExchange.GetItems(GetItemsRequest1 request)
at Ews.Client.DataExchangeClient.GetItems(GetItemsRequest request)
at Ews.Client.EwsClient.ExecuteAndLogCall[TRequest,TResponse](String methodName, TRequest request, Func`2 methodToLog)
at Ews.Client.EwsClient.GetItems(String[] ids)
at Mongoose.Service.Cache.ManagedEwsClient.ManageCall[T](IEndpoint endpoint, Func`2 method, Nullable`1 callVersion)
at Ucme.Extension.UcmeAlarmPushProcessor.Execute_Subclass(),
2021-05-18 00:00:13.5074,Info,Processor,<no principal>,Validation Prompt for UCME Alarm Push Processor: MayNotContinue : The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.

Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at Ews.Client.IDataExchange.GetItems(GetItemsRequest1 request)
at Ews.Client.DataExchangeClient.GetItems(GetItemsRequest request)
at Ews.Client.EwsClient.ExecuteAndLogCall[TRequest,TResponse](String methodName, TRequest request, Func`2 methodToLog)
at Ews.Client.EwsClient.GetItems(String[] ids)
at Mongoose.Service.Cache.ManagedEwsClient.ManageCall[T](IEndpoint endpoint, Func`2 method, Nullable`1 callVersion)
at Ucme.Extension.UcmeAlarmPushProcessor.Execute_Subclass()

Any idea what is the reason?

We have tried different EBO users but the result is the same.

Thank you.

Mike