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[BUG] Azure Kubernetes .NET Core 5.0 Unknown Error 258 #3910
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Issue needing attention of @Azure/aks-leads |
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Issue needing attention of @Azure/aks-leads |
Issue needing attention of @Azure/aks-leads |
Issue needing attention of @Azure/aks-leads |
Issue needing attention of @Azure/aks-leads |
Issue needing attention of @Azure/aks-leads |
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Describe the bug
We are running a .NET Core 5.0 application in a Azure Kubernetes Service cluster. The application connects to an Azure SQL Managed Instance via private endpoint.
We are receiving the following error.
To Reproduce
We have had many investigations regarding this error. However, we could not determine the source of the problem and the solution.
Expected behavior
AKS and SQL connection should execute successfully every time. 🫠
Screenshots
![snat_port_exhaustion](https://private-user-images.githubusercontent.com/19373869/268624253-0ee20c19-fb82-40ca-8aae-ec4b4d58cd2f.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3MjAzNzQxODIsIm5iZiI6MTcyMDM3Mzg4MiwicGF0aCI6Ii8xOTM3Mzg2OS8yNjg2MjQyNTMtMGVlMjBjMTktZmI4Mi00MGNhLThhYWUtZWM0YjRkNThjZDJmLnBuZz9YLUFtei1BbGdvcml0aG09QVdTNC1ITUFDLVNIQTI1NiZYLUFtei1DcmVkZW50aWFsPUFLSUFWQ09EWUxTQTUzUFFLNFpBJTJGMjAyNDA3MDclMkZ1cy1lYXN0LTElMkZzMyUyRmF3czRfcmVxdWVzdCZYLUFtei1EYXRlPTIwMjQwNzA3VDE3MzgwMlomWC1BbXotRXhwaXJlcz0zMDAmWC1BbXotU2lnbmF0dXJlPTgxMWI3OTVlNWEwMTI0MmZkODZlNGZlMTczOWNiNGQwMTZhMDI5YjBlNTdlYTJiNGE3ZTcxNmRkZDBmYmIyMGMmWC1BbXotU2lnbmVkSGVhZGVycz1ob3N0JmFjdG9yX2lkPTAma2V5X2lkPTAmcmVwb19pZD0wIn0.GZdOgNe43hu8mywCq7n1agP5DPlsxtwB4SfJMZEeF-g)
![lost_carrier](https://private-user-images.githubusercontent.com/19373869/268626581-748e34e2-b44f-42c6-a092-20cf7ce813b7.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.bQsD0vAxFUdsRzpo2MSJ9NHeQI1UZd0wH4FgYZLgyUg)
Environment (please complete the following information):
Additional context
Execution Timeout Expired Error (258, ReadSniSyncOverAsync) #647
Intermittent Unknown error 258 with no obvious cause #1530
SQL Server DbCommand Timeout with .Net Core container under load
Azure Kubernetes .NET Core App to Azure SQL Database Intermittent Error 258
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