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Address Copilot review feedback: SPN safety, DNS isolation, and test …

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Fix SPN using instance name instead of resolved port for Protocol.None and Protocol.Admin #4180

Address Copilot review feedback: SPN safety, DNS isolation, and test …
d485228
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Azure Pipelines / PR-SqlClient-Project failed May 7, 2026 in 1h 4m 53s

Build #12708 had test failures

Details

Tests

  • Failed: 34 (0.01%)
  • Passed: 254,648 (97.53%)
  • Other: 6,406 (2.45%)
  • Total: 261,088

Annotations

Check failure on line 72 in Build log

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

Build log #L72

Error: The process '/opt/hostedtoolcache/dotnet/dotnet' failed with exit code 1

Check failure on line 74 in Build log

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

Build log #L74

Dotnet command failed with non-zero exit code on the following projects : [ '/mnt/vss/_work/1/s/build.proj' ]

Check failure on line 0 in EXEC

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

EXEC#L0

EXEC(0,0): Error Message: 

Check failure on line 727 in build.proj

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

build.proj#L727

build.proj(727,5): Error MSB3073: The command " "dotnet" test "D:\a\_work\1\s\src\..\src/Microsoft.Data.SqlClient/tests/UnitTests/Microsoft.Data.SqlClient.UnitTests.csproj" -p:Configuration=Debug --blame-hang --blame-hang-dump-type full --blame-hang-timeout 10m --filter "category=flaky" -f net9.0 --results-directory "TestResults" --logger:"trx;LogFilePrefix=SqlClientUnit-Windows_NT-net9.0" " exited with code 1.

Check failure on line 1 in Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

Microsoft.Data.SqlClient.SqlException : Connection Timeout Expired.  The timeout period elapsed during the post-login phase.  The connection could have timed out while waiting for server to complete the login process and respond; Or it could have timed out while attempting to create multiple active connections.  This failure occurred while attempting to connect to the Principle server.  The duration spent while attempting to connect to this server was - [Pre-Login] initialization=3; handshake=69; [Login] initialization=0; authentication=0; [Post-Login] complete=5425; 
---- System.ComponentModel.Win32Exception : The wait operation timed out
Raw output
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 1279
   at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, SqlCommand command, Boolean callerHasConnectionLock, Boolean asyncClose) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 1739
   at Microsoft.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning(Boolean callerHasConnectionLock, Boolean asyncClose) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1251
   at Microsoft.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 4171
   at Microsoft.Data.SqlClient.TdsParserStateObject.ReadSniSyncOverAsync() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 3580
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryReadNetworkPacket() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 3479
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryPrepareBuffer() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1473
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryReadByte(Byte& value) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1789
   at Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 2475
   at Microsoft.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 2362
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.CompleteLogin(Boolean enlistOK) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 2232
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, TimeoutTimer timeout, Boolean withFailover, Boolean isFirstTransparentAttempt, Boolean disableTnir) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 2196
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.LoginWithFailover(Boolean useFailoverHost, ServerInfo primaryServerInfo, String failoverHost, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionOptions connectionOptions, SqlCredential credential, TimeoutTimer timeout) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 3648
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionOptions connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 3845
   at Microsoft.Data.SqlClient.Connection.SqlConnecti
... [The stack trace has been truncated as it exceeded the maximum allowed size. Please refer to the complete log available in the Test Run attachments for full details.]

Check failure on line 1 in Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

Microsoft.Data.SqlClient.SqlException : Connection Timeout Expired.  The timeout period elapsed during the post-login phase.  The connection could have timed out while waiting for server to complete the login process and respond; Or it could have timed out while attempting to create multiple active connections.  This failure occurred while attempting to connect to the Principle server.  The duration spent while attempting to connect to this server was - [Pre-Login] initialization=3; handshake=83; [Login] initialization=0; authentication=0; [Post-Login] complete=5406; 
---- System.ComponentModel.Win32Exception : The wait operation timed out
Raw output
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 1279
   at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, SqlCommand command, Boolean callerHasConnectionLock, Boolean asyncClose) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 1739
   at Microsoft.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning(Boolean callerHasConnectionLock, Boolean asyncClose) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1251
   at Microsoft.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 4171
   at Microsoft.Data.SqlClient.TdsParserStateObject.ReadSniSyncOverAsync() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 3580
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryReadNetworkPacket() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 3479
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryPrepareBuffer() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1473
   at Microsoft.Data.SqlClient.TdsParserStateObject.TryReadByte(Byte& value) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParserStateObject.cs:line 1789
   at Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 2475
   at Microsoft.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\TdsParser.cs:line 2362
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.CompleteLogin(Boolean enlistOK) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 2232
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, TimeoutTimer timeout, Boolean withFailover, Boolean isFirstTransparentAttempt, Boolean disableTnir) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 2196
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.LoginWithFailover(Boolean useFailoverHost, ServerInfo primaryServerInfo, String failoverHost, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionOptions connectionOptions, SqlCredential credential, TimeoutTimer timeout) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 3648
   at Microsoft.Data.SqlClient.Connection.SqlConnectionInternal.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionOptions connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\src\Microsoft\Data\SqlClient\Connection\SqlConnectionInternal.cs:line 3845
   at Microsoft.Data.SqlClient.Connection.SqlConnecti
... [The stack trace has been truncated as it exceeded the maximum allowed size. Please refer to the complete log available in the Test Run attachments for full details.]

Check failure on line 1 in Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

See this annotation in the file changed.

@azure-pipelines azure-pipelines / PR-SqlClient-Project

Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner

Assert.Equal() Failure: Values differ
Expected: 1
Actual:   2
Raw output
   at Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.NetworkError_WithUserProvidedPartner_RetryEnabled_ShouldConnectToFailoverPartner() in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\tests\UnitTests\SimulatedServerTests\ConnectionFailoverTests.cs:line 334

Check failure on line 1 in Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.TransientFault_WithUserProvidedPartner_ShouldConnectToPrimary(errorCode: 40613)

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@azure-pipelines azure-pipelines / PR-SqlClient-Project

Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.TransientFault_WithUserProvidedPartner_ShouldConnectToPrimary(errorCode: 40613)

Assert.Equal() Failure: Values differ
Expected: 2
Actual:   3
Raw output
   at Microsoft.Data.SqlClient.UnitTests.SimulatedServerTests.ConnectionFailoverTests.TransientFault_WithUserProvidedPartner_ShouldConnectToPrimary(UInt32 errorCode) in D:\a\_work\1\s\src\Microsoft.Data.SqlClient\tests\UnitTests\SimulatedServerTests\ConnectionFailoverTests.cs:line 477
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr)