azure functions System.Private.CoreLib: Transport endpoint is not connected : '/home/site/wwwroot/host.json'.

Question

Would much appreciate your help here.

Since yesterday we are having issues with one of our function apps.

We are getting the following message in Portal:

azure functions System.Private.CoreLib: Transport endpoint is not connected : '/home/site/wwwroot/host.json'.

I need to restart the function every while to get it going.

Logs show:

Answer 1

Hello, @javier cohenar - Thanks for reaching out! Based on the screenshot you've included, it looks like the root cause is the error "Descriptors can not be created directly .." which is causing the "Exceeded language worker restart retry count for runtime:python" error between Python worker and Host runtime.

The issue occurs due to a breaking change in the Protocol Buffers package which may be used, and we have guidance on the matter here: Troubleshoot errors with Protocol Buffers

Could you try it out and let us know if the issue gets resolved?