az webapp deloy failure with az cli 2.70 & 2.71 version

[zhengchaoz-kr]

Describe the bug

We recently upgraded our az-cli image from 2.58 to 2.70 and we noticed that there are some additional steps added when running az webapp deploy.
With 2.58 we are seeing:

• az webapp deploy --name app-sat-snw-dev-cus --resource-group rg-sns-deva51-centralus --type jar --src-path /__w/sat-notification-web/sat-notification-web/sat-notification-web/deploy.jar
  WARNING: Initiating deployment
  WARNING: Deploying from local path: /__w/sat-notification-web/sat-notification-web/sat-notification-web/deploy.jar
  WARNING: Deployment has completed successfully
  WARNING: You can visit your app at: http://app-sat-snw-dev-cus.azurewebsites.net/

But with 2.70/2.71 we are seeing

• az webapp deploy --name app-sat-snw-dev-cus --resource-group rg-sns-deva51-centralus --enable-kudu-warmup false --restart false --type jar --src-path /__w/sat-notification-web/sat-notification-web/sat-notification-web/deploy.jar
  WARNING: Initiating deployment
  WARNING: Deploying from local path: /__w/sat-notification-web/sat-notification-web/sat-notification-web/deploy.jar
  WARNING: Polling the status of sync deployment. Start Time: 2025-05-05 13:16:01.208729+00:00 UTC
  WARNING: Status: Build successful. Time: 1(s)
  WARNING: Status: Starting the site... Time: 16(s)
  ...
  ERROR: Deployment failed because the site failed to start within 10 mins.
  InprogressInstances: 0, SuccessfulInstances: 0, FailedInstances: 1
  Error: Deployment for site 'app-sat-snw-dev-cus' with DeploymentId '4479f21f-a413-4b37-b148-060b644ffed7' failed because the worker proccess failed to start within the allotted time.
  Please check the runtime logs for more info: https://app-sat-snw-dev-cus.scm.azurewebsites.net/api/logs/docker

At the same time, the app service will jump to 100% cpu and I can no longer deploy. I have to switch back to 2.58 to redeploy.

I tried to disable both --enable-kudo-warmup false and --restart false but still having the same result.
Is there a fix or a workaround that I can skip this "Starting the site" step?
Thanks

Related command

az webapp deploy --name app-sat-snw-dev-cus --resource-group rg-sns-deva51-centralus --enable-kudu-warmup false --restart false --type jar --src-path /__w/sat-notification-web/sat-notification-web/sat-notification-web/deploy.jar

Errors

ERROR: Deployment failed because the site failed to start within 10 mins.
InprogressInstances: 0, SuccessfulInstances: 0, FailedInstances: 1
Error: Deployment for site 'app-sat-snw-dev-cus' with DeploymentId '4479f21f-a413-4b37-b148-060b644ffed7' failed because the worker proccess failed to start within the allotted time.
Please check the runtime logs for more info: https://app-sat-snw-dev-cus.scm.azurewebsites.net/api/logs/docker

Issue script & Debug output

N/A

Expected behavior

az webapp deploy ran successfully.

Environment Summary

azure-cli 2.70.0 *

core 2.70.0 *
telemetry 1.1.0

Dependencies:
msal 1.31.2b1
azure-mgmt-resource 23.1.1

Python location '/usr/bin/python3.12'
Config directory '/github/home/.azure'
Extensions directory '/github/home/.azure/cliextensions'

Python (Linux) 3.12.9 (main, Mar 11 2025, 15:30:57) [GCC 13.2.0]

Legal docs and information: aka.ms/AzureCliLegal

Additional context

No response

[azure-client-tools-bot-prd]

Hi @zhengchaoz-kr,

2.70.0 is not the latest Azure CLI(2.71.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @AzureAppServiceCLI, @antcp, @yutanglin16.

[zhengchaoz-kr]

I tried 2.71 and having the same problem