azure-functions-host: Azure Portal can't list functions. Error: Azure Functions Runtime is unreachable. https://functions.azure.com/api/passthrough 500

Investigative information

Please provide the following:

  • Timestamp: 2019-08-28T03:15:31.304Z
  • Function App version (1.0 or 2.0): 2.0
  • Function App name: mhg-dev-dayforce-integrations-adp
  • Function name(s) (as appropriate): All of them
  • Invocation ID: this isn’t for a specific invocation, as it’s happening on the Azure Portal. I have “Session Id: 2c165a33f1934cf591994e1809771e7e
  • Region: Australia East

I’ve seen similar issues reported, but it seems all of them have been closed with no definitive outcome and below average investigations:

https://github.com/Azure/azure-functions-ux/issues/3166

https://github.com/Azure/azure-functions-host/issues/4081

Repro steps

  1. Deploy any function app to our Isolated App Service Environment!
  2. Open the app in the portal.

Expected behavior

Azure Portal should list functions and their status. This was working correctly for us about a month ago.

Actual behavior

image

Known workarounds

None

Related information

Provide any related information

  • Programming language used: C#

About this issue

  • Original URL
  • State: closed
  • Created 5 years ago
  • Comments: 22 (8 by maintainers)

Most upvoted comments

I had same issue this morning. By Scaling down the app service plan and again Scaling up to the previous plan it got resolved. I am using Python version of function app. Basically the thing I found was my every function app was affected due to this.

I tried to restart/stop function app but that did not resolved the issue. Then I created a new function app with same app service plan but that also got failed hence I found App service plan is the one which is causing other apps to fail so I tried to scale up and down it and it worked.