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Fix deadlock while cancelling NpgsqlConnection.Wait via CancellationToken #5976

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Fix deadlock while cancelling NpgsqlConnection.Wait via CancellationToken #5976

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c59210f
Fix deadlock while cancelling NpgsqlConnection.Wait via CancellationT…
vonzshik Dec 17, 2024
d04c8d4
Make sure ReadBuffer.Timeout isn't changed concurrently
vonzshik Dec 17, 2024
45448d5
Set timeout before registering cancellation token callback
vonzshik Dec 18, 2024
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Set timeout before registering cancellation token callback
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@vonzshik
vonzshik committed Dec 18, 2024
commit 45448d5689568fe6035cbf9348d4d42d58312083
6 changes: 3 additions & 3 deletions src/Npgsql/Internal/NpgsqlConnector.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2482,13 +2482,13 @@ UserAction DoStartUserAction(ConnectorState newState, NpgsqlCommand? command,
State = newState;
_currentCommand = command;

StartCancellableOperation(cancellationToken, attemptPgCancellation);

// We reset the ReadBuffer.Timeout for every user action, so it wouldn't leak from the previous query or action
// For example, we might have successfully cancelled the previous query (so the connection is not broken)
// But the next time, we call the Prepare, which doesn't set it's own timeout
// But the next time, we call the Prepare, which doesn't set its own timeout
ReadBuffer.Timeout = TimeSpan.FromSeconds(command?.CommandTimeout ?? Settings.CommandTimeout);

StartCancellableOperation(cancellationToken, attemptPgCancellation);

return new UserAction(this);
}

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