Azure Event Hub: Unknown outgoing messages in resource metrics

0
votes

We've just started using a new Azure Event Hub resource with a pretty basic setup. There are two hub instances, sending and receiving to and from these instances is done by a Logic App, Stream Analytics and an Azure Function every two hours. From the metrics section within the Azure portal I get the following diagram:

Event Hub Metrics

I can explain the light blue and purple peaks happening every two hours. But does anyone have an idea about the four messages going out once an hour? Drilling into the metrics I can see that it's actually two messages per hub instance. Unfortunately I have not yet found a way to identify these messages. Is this maybe an internal technical thing? And if so:

  1. Can I ignore these messages?
  2. Can I still find the message content anywhere within the Azure portal or Service Bus Explorer?

Thanks in advance, Tobi

UPDATE: Things have slightly changed, there are now multiple occurrences of unidentified outgoing messages per hour:

enter image description here

UPDATE 2: Sorry for the confusion, it's still the same amount of unknown messages (4 in total, 2 per hub instance); they*re just not processed at the same time anymore.

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azureazure-eventhub

1 Answers

0
votes

in order to identify these messages, I will recommend to:

  1. Add an additional output to blob storage in this Stream Analytics job
  2. Add another step in the same job outputting all messages to this new output: e.g. SELECT * INTO newoutput FROM input

Then, restart the job Using storage explorer you can have a look at these messages.

Let me know how it goes.

Thanks,

JS