I'm developing a chatbot using Microsoft.Bot.Builder v3.15.2.2, QnA Maker (preview mode, aka 'old') and QnAMakerDialog (from Microsoft.Bot.Builder.CognitiveServices v1.1.7). I'm using Direct API as a channel and BotFramework-WebChat to embed my chatbox in a web page. I've also implemented a custom bot data store to persist the bot's state.
From time to time (I cannot establish a pattern), during a conversation with the bot, I receive the following error:
Microsoft.Bot.Connector.ErrorResponseException: Operation returned an invalid status code
'Unauthorized' at Microsoft.Bot.Connector.Conversations.
<ReplyToActivityWithHttpMessagesAsync>d__9.MoveNext() --- End of stack trace from previous
location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.
ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.
HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Bot.Connector.
ConversationsExtensions.<ReplyToActivityAsync>d__9.MoveNext() --- End of stack trace from
previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.
TaskAwaiter`1.GetResult() at UCB.ChatBot.Bot.Controllers.MessagesController.<Post>d__3.
MoveNext() in [...]Bot\Controllers\MessagesController.cs:line 39
After this error shows up, the bot keeps replying 'Sorry! Not able to match any of the options.' or, keeps giving you an answer to a question asked way before, in the beginning of the conversation. A Ctrl + F5 fixes this issue and the bot returns to the expected behavior.
This happens sporadically - as I said, I cannot establish a pattern or reproduce it. Maybe once or twice a day or a week.
Any thoughts or hints are very welcomed.
