Thanks for reaching out to Q&A.
Given the frequency of the issue, it appears to be transient issue which is common in cloud computing world. Having a retry mechanism should take care of transient issues.
However, if the issue is seen consistently/in a certain pattern, you will have to look into the outbound connections of the function app. The number of available connections in a Consumption plan is limited partly because a function app in this plan runs in a sandbox environment. One of the restrictions that the sandbox imposes on your code is a limit on the number of outbound connections, which is currently 600 active (1,200 total) connections per instance. When you reach this limit, the functions runtime writes the following message to the logs: Host thresholds exceeded: Connections. For more information, see the Functions service limits.
Please look into this article to manage connections in function app : https://learn.microsoft.com/en-us/azure/azure-functions/manage-connections?tabs=csharp
I hope this helps!
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