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Welcome to the Bot Framework SDK for .NET repository, which is the home for the libraries and packages that enable developers to build sophisticated bot applications using .NET.
https://github.com/Microsoft/botframework
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Teams periodically fails to send messages #6811

Closed jamesemann closed 4 months ago

jamesemann commented 4 months ago

Version

Latest

Describe the bug

Using the teams channel, it is intermittently not calling my endpoint with the user message.

This seems to be a recent issue. I have first noticed it today (26 Jun) , we have previously been widely using teams bots without any reported issues.

This happens with both app-reg backed bots and MSI backed bots.

To Reproduce

  1. Use ngrok to test locally

  2. Create an azure bot resource and deploy the bot code, you can just use the echobot example for this. The functionality of the bot doesn't matter as the problem occurs in the comms between teams->the bot endpoint.

  3. In teams, send a set of messages in quick succession, e.g. 1, 2, 3, etc. Ideally these will have different content so you can map them to the requests in ngrok.

📝 After a few messages (I can usually get it to fail within 10 messages) it will fail to send one of the messages. You can inspect ngrok to see that the endpoint has not been called.

Expected behavior

It should deliver all messages reliably.

The UX is negatively impacted for the end users, as they are unsure whether the messages are received or not.

Screenshots

I can share a video of this privately if required.

Additional context

Please reach out for any additional context needed.

dmvtech commented 4 months ago

I am able to reproduce. As this doesn't make it to ngrok, it's not an SDK problem, but Teams. Will attempt to get Teams to investigate.

dmvtech commented 4 months ago

I am no longer able to reproduce. There may have been some transient errors on the Teams side yesterday. Are you still able to reproduce?

jamesemann commented 4 months ago

Hi @dmvtech - this seems to be working ok now. Thank you for looking into it