Azure SCM/Kudu/Log stream not available after creating web app

Question

Azure SCM/Kudu/Log stream not available after creating web app

Paul Simons 1

To my understanding, scm/Kudu console and related website should always be available for debugging, especially right after creating a new appservice plan and deploying a web app into it. If it does not start I would use log stream to resolve the issues.
Lately I am not able to get any of this funcionality working even though other appservice plans work great.
https://prnt.sc/Y7BJeYXvAG0B
https://prnt.sc/wTs9RMcES0aR - I am unable to access diagnostic resources.

Additional info:
sometimes on <myapp>.scm.azurewebsites.net I get
502 - Web server received an invalid response while acting as a gateway or proxy server.
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

https://prnt.sc/logLmt6hI0Jo
https://prnt.sc/01_MPeUtH5wK

And sometimes it's service unavailable.

Magnus Oxenwaldt 166 Reputation points

2022-05-17T16:32:42.607+00:00

You find it under advanced tools and debug , cmd via the app service resource page in portal.azure.com
Paul Simons 1 Reputation point

2022-05-17T18:48:49.317+00:00

That IS what I'm trying to solve. It's unavailable
https://prnt.sc/logLmt6hI0Jo
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2022-05-18T07:12:39.023+00:00

@Paul Simons Thanks for reaching out. There may be many reasons for 502 error. Just want to check if you have enabled diagnostics logging for your web app.
You can follow these guides on Remote debugging web apps and Troubleshoot HTTP 502 & 503 to narrow down this issue and see which one you are running into.

If you are not able to narrow down the issue post using the above troubleshooting guides, could you please help us with the app name and the timestamp to troubleshoot from our end as well. Please let us know if further queries or issues remain.
Paul Simons 1 Reputation point

2022-05-18T07:49:24.437+00:00

I am sorry, but I think you slightly misunderstood - I'm getting these errors NOT from web app, but from the underlying service (SCM/KUDU) however we call it. The app is running but the logging and debugging section is unavailable. Is that normal behavior in any way? :|

1 answer

Your answer

Magnus Oxenwaldt 166 Reputation points

2022-05-17T16:32:42.607+00:00

You find it under advanced tools and debug , cmd via the app service resource page in portal.azure.com
Paul Simons 1 Reputation point

2022-05-17T18:48:49.317+00:00

That IS what I'm trying to solve. It's unavailable
https://prnt.sc/logLmt6hI0Jo
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2022-05-18T07:12:39.023+00:00

@Paul Simons Thanks for reaching out. There may be many reasons for 502 error. Just want to check if you have enabled diagnostics logging for your web app.
You can follow these guides on Remote debugging web apps and Troubleshoot HTTP 502 & 503 to narrow down this issue and see which one you are running into.

If you are not able to narrow down the issue post using the above troubleshooting guides, could you please help us with the app name and the timestamp to troubleshoot from our end as well. Please let us know if further queries or issues remain.
Paul Simons 1 Reputation point

2022-05-18T07:49:24.437+00:00

I am sorry, but I think you slightly misunderstood - I'm getting these errors NOT from web app, but from the underlying service (SCM/KUDU) however we call it. The app is running but the logging and debugging section is unavailable. Is that normal behavior in any way? :|

Answer 1

Ryan Hill 30,281 Microsoft Employee Moderator

Hi @Paul Simons ,

Not accessing SCM could indicate an underlying issue with the web worker, especially if it's intermittent. It's definitely an edge case. If see it pretty consistently, I would create a new app service by cloning the existing app or redeploying the code.

To address the underlying issue with this app service, please respond to @VenkateshDodda-MSFT 's private comment above so we can work more closely with you to investigate what's causing this issue with SCM.

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Azure SCM/Kudu/Log stream not available after creating web app

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