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stefdegoey asked SnehaAgrawal-MSFT commented

App Service throws EndpointNotFoundException errors after out scaling

Hi community,

Recently we discovered some problems on the production environment at our customer.
For performance reasons we setup a scheduled Out Scale on our production App Service. This scheduled Out Scale is planned for each monday at 18:00, Amsterdam time.

Whenever the Scale Out is completed, we receive a high volume of errors in our App Service.
The error states: 'System.ServiceModel.EndpointNotFoundException: There was no endpoint listening' or 'The creator of this fault did not specify a reason.'
We are certain that the endpoint we try to call is available.

After some investigation we do see problems with the SNAT port exhaustion. The problem is, we don't know how we can resolve this issue.
Is this a common problem? Did we configure something incorrectly? Is our code incorrect? I hope anyone is able to assist us in this matter.

Yours faithfully,
Stef

azure-webapps
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