[CI Failure] Flaky: AzureSqlPrincipalReconciliationTests fail because SqlServerContainerFixture cannot bind port 1433 (address already in use)

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Build Information

Build: https://github.com/microsoft/aspire/actions/runs/31019606526
Build error leg or test failing: Tests / Hosting.Azure / Hosting.Azure (ubuntu-latest) / Aspire.Hosting.Azure.Tests.AzureSqlPrincipalReconciliationTests
Pull request: #19007

Error Message

Class fixture type 'Aspire.Hosting.Azure.Tests.SqlServerContainerFixture' threw in InitializeAsync
---- Docker.DotNet.DockerApiException : Docker API responded with status code=InternalServerError, response={"message":"failed to set up container networking: driver failed programming external connectivity on endpoint ...: failed to bind host port for 0.0.0.0::172.17.0.3:1433/tcp: address already in use"}
at Aspire.Hosting.Azure.Tests.SqlServerContainerFixture.InitializeAsync() in SqlServerContainerFixture.cs:line 28

Description

Flaky: AzureSqlPrincipalReconciliationTests fail because SqlServerContainerFixture cannot bind port 1433 (address already in use)

Type: flaky-test

Occurrences

Date	Build	Job	PR
2026-08-05	31019606526	Tests / Hosting.Azure / Hosting.Azure (ubuntu-latest)	#19007
2026-08-05	31047577163	Tests / Hosting-1 / Hosting-1 (windows-latest)	#18850
2026-08-20	32403422458	Tests / Hosting.Azure / Hosting.Azure (ubuntu-latest)	#19238
2026-09-02	33578521517	Tests / Hosting.GitHub.Models / Hosting.GitHub.Models (windows-latest)	#19670
2026-09-10	34433050282	Tests / No-package tests (regular, Aspire.Cli.Tests, Cli, Cli, tests/Aspire.Cli.Tests/Aspire.Cli.Tests.cs... / Cli (macos-latest)	#19682