Eventstream throttled soon. Eventstream is currently experiencing heavy traffic.

[omarecd]

Dear Community

I have an Eventstream collecting msgs from an Event Hub, these msgs go then to a KQL database. In Event Hub I don't have a lot of traffic, there is just 1 msg each 5 minutes.

This weekend I was running some KQL queries and they were not executed because I was consuling a lot of resources, it was not clear for my why. Doing a bit of troubleshooting, I checked the event stream and the issue came from there already I received the notification: "Eventstream throttled soon. Eventstream is currently experiencing heavy traffic". I checked and double checked to see if there was something strange but nothing. My usual msg coming each 5 mins and nothing else.

My question is, how could I get throttled just with 1 msg each 5 minutes ?

Thanks in advance and greetings from Belgium 🇧🇪 .

Omar C .

[v-junyant-msft]

Hi @omarecd ,

What do you mean by “1 msg each 5 minutes”? What does this message refer to?

The fact that Eventstream gives feedback every 5 minutes does not mean that its data transmission rate is 1 piece of data every 5 minutes. It is possible that your data transmission rate is too fast, causing Eventstream or KQL Database to be unable to receive it in time.

You can try to modify the Event throughput:
https://learn.microsoft.com/en-us/fabric/real-time-intelligence/event-streams/configure-settings#eve... 

You can also try to modify the Request limits policy of Kusto Query:
Request limits policy - Kusto | Microsoft Learn

Best Regards,
Dino Tao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[omarecd]

Hello @v-junyant-msft , thanks for the feedback.

I have a setup where 1 device is sending data  IoT Hub, only 1 device, sending 1 msg each 5 minutes. IoT Hub collects the msgs from all the devices (in my case 1) and then send them to Event Hub, Event Hub which is the datasource for the event stream, that is why I know that there is only 1 msg each 5 mins.

With this in mind, I still don't understand why I get the msg that I am receiving:

...

Now that I check in detail, I see indeed that the msgs from the event hub are being originated/created each 5mins (in green) but for some reason all the msgs are treated/processed again (in red), that is not fine... I think that's the cause of the issue ! But why could I have that ? How it comes ?

Thanks a lot, dear community.

Omar C.