getawaiter().getresult() deadlock|Why is .GetAwaiter().GetResult() bad in C#?

getawaiter().getresult() deadlock,As I describe on my blog, GetAwaiter().GetResult() can deadlock when it's used in a one-thread-at-a-time context. This is most commonly seen when called on the . Using Task.Run(.).GetAwaiter().GetResult() can be used as a workaround to run async code and wait on it synchronously, it will not result in an async deadlock, . If the thing you're blocking on will itself require a thread pool thread to do work, then you're relying on there being another thread available in the pool at some .

there are so many people said replace Task.Result or Task.Wait () with GetAwaiter ().GetResult (), but in my code , the GetAwaiter ().GetResult () still cause . If you are using ".GetAwaiter ().GetResult ()", ".Result" or ".Wait ()" to get the result of a task or to wait for the task completion you may experience deadlocks or .Gets an awaiter used to await this Task. public: System::Runtime::CompilerServices::TaskAwaiter GetAwaiter (); C#. Copy. public .

The GetAwaiter().GetResult() method call is equivalent to calling Task.Wait() method and Task.Result. However, the difference is that .Why is .GetAwaiter().GetResult() bad in C#? GetAwaiter ().GetResult () The GetAwaiter member was added to Task and Task in .NET 4.5, and it’s available as an extension method on .NET 4.0 using the .

This series will go through understanding deadlocks, show common deadlock types, how to solve them, how to debug them and best practices to avoid .I have 2 projects, both use Net 5, entity framework Net 5 and async. The unique difference is that the project that is blocked use Sql Server and the other use Sqlite.GetAwaiter (). GetResult (); In general, I try my best to avoid synchronously blocking on an asynchronous task. However, there are a handful of situations where I do violate that guideline. In those rare conditions, my preferred method is GetAwaiter().GetResult() because it preserves the task exceptions instead of wrapping them in an .

In this case no method has to marked async, but not really sure about the use of GetAwaiter() Task.Run(async => //await http call, invoke callback).GetAwaiter().GetResult(); I am just trying to find out which is a better approach and if there are some issues with either approach that I should be aware of

The Task object is already complete, so .GetAwaiter().GetResult() just unwraps the result (or throws the first exception on the Task). This only works in MySqlConnector because the code guarantees that the Task has run to completion. With a non-completed Task, calling .GetAwaiter().GetResult() (or .Wait() or .Result) can easily

Using ConfigureAwait(false) to avoid deadlocks is a dangerous practice. You would have to use ConfigureAwait(false) for every await in the transitive closure of all methods called by the blocking code, including all third- and second-party code.Using ConfigureAwait(false) to avoid deadlock is at best just a hack).. As the title of this post .

In the previous post, we saw some the basics of .NET deadlocks. Including explanation of locks, how to debug deadlocks with the Thread Window and how to fix a deadlock. Well, one specific type of deadlock. . Be careful about using .Result or .GetAwaiter().GetResult() . They can easily cause deadlocks, especially when called .

The stack trace of a given expression will be much cleaner. But, under the wood, ".GetAwaiter()" is relying on ".Wait()", so you may experience the deadlocks or thread pool starvation. So, what I have to recommend you is to avoid at all cost using ".GetAwaiter().GetResult()", ".Result" or ".Wait()". Refactor your code from top to . Why Task.Result, Task.Wait and Task.GetAwaiter().GetResult() create a deadlock when used with async code. First, because a method is defined using the async key word it supports asynchronous execution of operations with the help of the await operator. Common types that support await are Task, Task, ValueTask, .

All this is defined in the C# specification regardless of the particular awaiter being used - note that Task.GetAwaiter is "intended for compiler use rather than for use in application code." But the point is that the intended use is to do an await, not Wait() nor GetAwaiter().GetResult() - but GetResult gives you nicer stacks if you need it. –

getawaiter().getresult() deadlock Why is .GetAwaiter().GetResult() bad in C#? ConfigureAwait configures the behaviour of the await keyword in the same expression. It does not affect other await statements in other methods, and it has no effect if you do not use await.. It controls whether the await statement captures the current SynchronizationContext (if there is one). In practice, if you run an await statement on the .

The calling code calls GetAwaiter().GetResult() on the (configured) returned task. This blocks the UI thread waiting on the task. This blocks the UI thread waiting on the task. 3 seconds later, the task returned by Task.Delay completes, and the continuation of DoWorkAsync is scheduled to the context captured by its await - the UI context.

You're experiencing the common deadlock that happens when you block on asynchronous code (described in detail on my blog). There are a variety of ways to get around it, but they're all hacks and none of them work in every situation.. In your case, I'd say either use the direct blocking hack or use the boolean argument hack.. The direct . Deadlock might also be cause by other sort of blocking code, waiting for semaphore, acquiring as lock. The advice in general is simple. Don’t block in async code. If possible this is the solution.

Both Task.Wait and Task.Result are blocking and may also cause deadlocks and on top of that they also wrap exceptions in an AggregateException.. Now if you are in a situation where you can't use async/await and you have to do sync over async, the preferred way to do it seems to be Task.GetAwaiter().GetResult(); which can still cause deadlocks but . I need to understand more about why async/await causes deadlock. As far as I know, using ConfigureAwait(false) will marshall back the operation to the original SynchronizationContext.I tried the following but it caused a deadlock: protected async Task> GetAsync(string requestUri, ReqModel model = null) { //. I know that synchronously waiting for an async Task inside ASP/UI context thread may casue deadlock. But here, the situation is little different since ConfigureAwait(false) . .GetAwaiter().GetResult(), that means that TaskService.RequestGoogleAsync has to use ConfigureAwait .getawaiter().getresult() deadlock Unfortunately, as the comment implies, that code wouldn’t actually work. It results in a common deadlock described in my “Best Practices in Asynchronous Programming” article I mentioned earlier. This is where the hack can get tricky. A normal unit test will pass, but the same code will deadlock if called from a UI or ASP.NET context. Task.GetAwaiter() returns a TaskAwaiter, and Task.GetAwaiter() returns a TaskAwaiter, both of which are distinct struct types. Since the compiler needs to get these awaiters prior to the await (IsCompleted, UnsafeOnCompleted) and then needs to access them after the await (GetResult), the awaiters need to

getawaiter().getresult() deadlock|Why is .GetAwaiter().GetResult() bad in C#?

getawaiter().getresult() deadlock|Why is .GetAwaiter().GetResult() bad in C#? .

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