Azure / Azure/Azure-Functions

[Premium] VNET Integration flaps on new Premium app

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#1,348 8 comments 0 reactions 2 assignees Claimed by @jeffhollan View on GitHub
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Description

We find that on
* a brand-new Premium plan
* running a brand-new V2 functions app

the **VNET Integration flaps between working and not-working**, for several hours.

Availability test pictured below, calls an HttpTrigger which:
* Connects to a Storage Account with ACL grant to the function app's subnet
* Connects to a Cosmos DB with same ACL grant
* Connects to a Event Hub with same ACL grant

My impression is that the tests either all succeed, or all fail. Therefore I am suspecting the VNET Integration rather than the 3 x Service Endpoints or 3 x ACLs.

![image](https://user-images.githubusercontent.com/3198421/66098321-7eda0680-e5e5-11e9-891c-d99495d53a54.png)

Do you need a repro or is this already a known issue?

A bit of randomness after creation isn't a total blocker, but if it pops up randomly in production, say on scaleout, that's much more serious.

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