Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Ports Fix deadlock in transaction (#1242) to .NET #2161

Merged
merged 6 commits into from
Oct 20, 2023
Merged

Ports Fix deadlock in transaction (#1242) to .NET #2161

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
e2514f7
Ports Fix deadlock in transaction (#1242) to .NET
danielmarbach Sep 19, 2023
7e8de0b
Align code between the two versions
danielmarbach Sep 20, 2023
052d1f7
Assert.Throws
danielmarbach Sep 20, 2023
0469097
Skip on non-supported targets
danielmarbach Sep 20, 2023
4aea3c5
32 bit doesn't support DTC
danielmarbach Sep 20, 2023
d1f1ad4
Update src/Microsoft.Data.SqlClient/tests/ManualTests/DataCommon/Data…
danielmarbach Oct 18, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
86 changes: 44 additions & 42 deletions src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/SqlDelegatedTransaction.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -348,31 +348,34 @@ public void SinglePhaseCommit(SinglePhaseEnlistment enlistment)
#endif
try
{
Exception commitException = null;

lock (connection)
// If the connection is doomed, we can be certain that the
// transaction will eventually be rolled back or has already been aborted externally, and we shouldn't
// attempt to commit it.
if (connection.IsConnectionDoomed)
{
// If the connection is doomed, we can be certain that the
// transaction will eventually be rolled back or has already been aborted externally, and we shouldn't
// attempt to commit it.
if (connection.IsConnectionDoomed)
lock (connection)
{
_active = false; // set to inactive first, doesn't matter how the rest completes, this transaction is done.
_connection = null;

enlistment.Aborted(SQL.ConnectionDoomed());
}
else

enlistment.Aborted(SQL.ConnectionDoomed());
}
else
{
Exception commitException;
lock (connection)
{
try
{
// Now that we've acquired the lock, make sure we still have valid state for this operation.
ValidateActiveOnConnection(connection);

_active = false; // set to inactive first, doesn't matter how the rest completes, this transaction is done.
_connection = null; // Set prior to ExecuteTransaction call in case this initiates a TransactionEnd event
_connection = null; // Set prior to ExecuteTransaction call in case this initiates a TransactionEnd event

connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Commit, null, System.Data.IsolationLevel.Unspecified, _internalTransaction, true);
commitException = null;
}
catch (SqlException e)
{
Expand All @@ -391,42 +394,41 @@ public void SinglePhaseCommit(SinglePhaseEnlistment enlistment)
ADP.TraceExceptionWithoutRethrow(e);
connection.DoomThisConnection();
}
if (commitException != null)
}
if (commitException != null)
{
// connection.ExecuteTransaction failed with exception
if (_internalTransaction.IsCommitted)
{
// connection.ExecuteTransaction failed with exception
if (_internalTransaction.IsCommitted)
{
// Even though we got an exception, the transaction
// was committed by the server.
enlistment.Committed();
}
else if (_internalTransaction.IsAborted)
{
// The transaction was aborted, report that to
// SysTx.
enlistment.Aborted(commitException);
}
else
{
// The transaction is still active, we cannot
// know the state of the transaction.
enlistment.InDoubt(commitException);
}

// We eat the exception. This is called on the SysTx
// thread, not the applications thread. If we don't
// eat the exception an UnhandledException will occur,
// causing the process to FailFast.
// Even though we got an exception, the transaction
// was committed by the server.
enlistment.Committed();
}
else if (_internalTransaction.IsAborted)
{
// The transaction was aborted, report that to
// SysTx.
enlistment.Aborted(commitException);
}
else
{
// The transaction is still active, we cannot
// know the state of the transaction.
enlistment.InDoubt(commitException);
}

connection.CleanupConnectionOnTransactionCompletion(_atomicTransaction);
// We eat the exception. This is called on the SysTx
// thread, not the applications thread. If we don't
// eat the exception an UnhandledException will occur,
// causing the process to FailFast.
}
}

if (commitException == null)
{
// connection.ExecuteTransaction succeeded
enlistment.Committed();
connection.CleanupConnectionOnTransactionCompletion(_atomicTransaction);
if (commitException == null)
{
// connection.ExecuteTransaction succeeded
enlistment.Committed();
}
}
}
catch (System.OutOfMemoryException e)
Expand Down
1 change: 0 additions & 1 deletion src/Microsoft.Data.SqlClient/netfx/src/Microsoft/Data/SqlClient/SqlDelegatedTransaction.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -387,7 +387,6 @@ public void SinglePhaseCommit(SysTx.SinglePhaseEnlistment enlistment)
Debug.Assert(null != enlistment, "null enlistment?");
SqlInternalConnection connection = GetValidConnection();


if (null != connection)
{
SqlConnection usersConnection = connection.Connection;
Expand Down
11 changes: 11 additions & 0 deletions src/Microsoft.Data.SqlClient/tests/ManualTests/DataCommon/DataTestUtility.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -439,6 +439,17 @@ public static bool IsTargetReadyForAeWithKeyStore()
;
}

public static bool IsSupportingDistributedTransactions()
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Decided to use fully qualified names here to avoid having to do if/def in the using section

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I tried to use the same Is pattern although I felt is is a bit of a clumsy name. I would have preferred SupportsDistributedTransactions but I wanted to make sure it fits the style of other such methods.

{
#if NET7_0_OR_GREATER
return OperatingSystem.IsWindows() && System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture != System.Runtime.InteropServices.Architecture.X86 && IsNotAzureServer();
#elif NETFRAMEWORK
return IsNotAzureServer();
#else
return false;
#endif
}

public static bool IsUsingManagedSNI() => UseManagedSNIOnWindows;

public static bool IsNotUsingManagedSNIOnWindows() => !UseManagedSNIOnWindows;
Expand Down
12 changes: 3 additions & 9 deletions ...crosoft.Data.SqlClient/tests/ManualTests/SQL/TransactionTest/TransactionEnlistmentTest.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -47,11 +47,10 @@ public static void TestManualEnlistment_Enlist_TxScopeComplete()
RunTestSet(TestCase_ManualEnlistment_Enlist_TxScopeComplete);
}

[SkipOnTargetFramework(TargetFrameworkMonikers.Netcoreapp)]
[ConditionalFact(typeof(DataTestUtility), nameof(DataTestUtility.AreConnStringsSetup), nameof(DataTestUtility.IsNotAzureServer))]
[ConditionalFact(typeof(DataTestUtility), nameof(DataTestUtility.AreConnStringsSetup), nameof(DataTestUtility.IsSupportingDistributedTransactions))]
public static void TestEnlistmentPrepare_TxScopeComplete()
cheenamalhotra marked this conversation as resolved.
Show resolved Hide resolved
{
try
Assert.Throws<TransactionAbortedException>( () =>
{
using TransactionScope txScope = new(TransactionScopeOption.RequiresNew, new TransactionOptions()
{
Expand All @@ -63,12 +62,7 @@ public static void TestEnlistmentPrepare_TxScopeComplete()
connection.Open();
System.Transactions.Transaction.Current.EnlistDurable(EnlistmentForPrepare.s_id, new EnlistmentForPrepare(), EnlistmentOptions.None);
txScope.Complete();
Assert.False(true, "Expected exception not thrown.");
}
catch (Exception e)
{
Assert.True(e is TransactionAbortedException);
}
});
}

private static void TestCase_AutoEnlistment_TxScopeComplete()
Expand Down