Problem using Azure Functions and Azure Cosmos DB, returning "down for maintenance"

3
votes

I am following this tutorial that creates an Azure Function trigged by http with output to CosmosDB.

https://docs.microsoft.com/en-us/azure/azure-functions/functions-integrate-store-unstructured-data-cosmosdb

When I create just a simple Azure function it works ok, I trigge by http and the http response its ok.

But if create a new output to a ComosDB using the example code indicated in the tutorial the function returns "THIS AZURE FUNCTIONS APP IS DOWN FOR MAINTENANCE" when trigged.

Please be patience, until last week I was just a c++ programmer hahaha.

My steps:

Creating a CosmosDB account and a database called "testDb".

CosmosDB account

Creating a Function App:

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When trigged using this code its ok.

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Creating a CosmosDB output.

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I change my code to this:

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Now when I trigger by http the response is:

enter image description here

What am I doing wrong?

Grateful.

1
node.jsazurecloudazure-functionsazure-cosmosdb

1 Answers

7
votes

Someone has reported same issue. To conclude the solution: In portal> Platform features> App Service Editor. Right click on app_offline.htm and delete.

This file is generated to stop the function app when you install cosmosdb extension. It is supposed to be deleted automatically after extension being installed, there seems some problem with this feature, probably related to the slow file system in Consumption plan.

If you are trapped again later, try to turn this behavior off, add an SCM_CREATE_APP_OFFLINE App Setting to your app and set the value to 0, check official announcement for this feature.