C# - implementing Async/Await in Entity Framework Core Leading to Deadlocks
I'm trying to debug I'm following best practices but I'm working with a deadlock situation when using async/await with Entity Framework Core (EF Core) 6 in a web application. My code is structured such that I have an API endpoint that queries the database asynchronously, but sometimes it hangs indefinitely or results in a `System.Data.SqlClient.SqlException: Timeout expired` behavior. Here's the relevant code snippet: ```csharp public async Task<IActionResult> GetUserDetails(int userId) { var userDetails = await _context.Users .Include(u => u.Orders) .FirstOrDefaultAsync(u => u.Id == userId); return Ok(userDetails); } ``` I have also noticed that when I call this API endpoint in a loop (for example, making multiple requests from a client), the scenario becomes more pronounced. I tried to optimize my database context lifetime by using `AddDbContext` with `ServiceLifetime.Scoped` in my `Startup.cs`, but it didn't help. Additionally, I have verified that this does not happen when I switch to synchronous calls. I've also attempted to run queries with `.AsNoTracking()` to reduce overhead, yet the question continues. Is there a recommended pattern or best practice for handling async calls with EF Core to avoid deadlocks? Or could this be related to how I'm configuring the DbContext or handling the service lifetime? Any suggestions would be greatly appreciated. The stack includes C# and several other technologies. What's the best practice here? This issue appeared after updating to C# latest. I'd love to hear your thoughts on this.