Race Conditions in C# .NET Core 

Source code for patreon supporters includes an example of how to simulate race conditions using Threads. www.patreon.com/raw_coding

Anton, your channel is so underrated... I hope you hit 1M subs pretty soon! Thank you mate!

Great content Anton. Learning from you is great.

That is awesome. Thanks Please, make similar video about deadlocks with real examples in real projects

Hello, Anton Finally, I found a person who shows real things that are really useful for production, and not another set of CRUDs tutorials with a repository pattern (around EF) and 3-layer architecture. By the way, the guys from dev mentors also have very good content and trying to provide REAL things. It's not fair that your channel is so underrated, because people just need the simplest things, e.g python bases, how to parse a json files or create a bot that sends hello world (I'm a cool and useful bot (no)). I worked for a long time as a senior and lead software engineer in OLTP systems, microservices, DDD and etc. It was all around dotnet, C#, azure environment. 2 years ago, I had a situation on a project where I had to migrate data from PostgreSQL to ClickHouse due to the performance of query execution and thus moved to OLAP systems, big data, python, spark, airflow, azure data factory etc., where a lot is built around python, SCALA, R, java and so on And it's really a shame that dotnet is quite capable of being in the same category, and in terms of performance, it's definitely one of the leaders. I don’t know if you have worked with Spark or not, but Microsoft has github.com/dotnet/spark, so do you believe in the future of dotnet in the context of big data, machine learning, etc? Thank you

11:39 - I think the explanation about thread starvation is a bit confusing … But here is my understanding: 10 Tasks 5 Threads 1 thread made it through the locks 4 threads waits (each one with a task assigned) Threads #1 (in the lock) go to read file see async/await return to thread pool then it get assigned a new task task#6 comes and see the lock blocks too! Important: Assuming the thread-pool size is 5; if not then a thread from the thread-pool will just be assigned to the file-writing that was previously started by thread#1 and leave the lock. Ps: For those curious to see this simulation, make sure U set the ThreadPool.SetMinThreads and also ThreadPool.SetMaxThreads

That last bit about distributed lock was useful 😎

I have been watching Anton since the beginning of his channel and it is amazing to see how much he has improved the quality of his content. Each time he explains better and in less time. Community: How could we help him get more popularity and views? Can you imagine Anton dedicating himself to RU-vid full-time? 😱

The last part about how you can use Redis to handle lock on a distributed system / distributed lock is very useful

outstanding video. great information & step-by-step demo. thanks

7:31 - 2x Task

I love your videos, thanks for making them

Hey Anton, thank you for the awesome video, keep it up! I have a related question that confusing me, when we declare our services as scoped, does that means the .Net will separate contexts between scopes and eliminate racing conditions between them, so one scope will not enter another scope context? And if you could create a video explaining scopes/transients in the context of threadings and race conditions that would be awesome, thank you!

Thanks

Good high-end topic, with suggestions for resolutions

Everything that inherits Stream class next please... :)

5:00 I'm still a bit uncertain as to why the Task.WhenAll isn't sufficient to have the number get to 1000 before the Console.WriteLine?

Regarding distributed locking, from what I saw people usually tend to use it to lock updating files and not concurrent database updates! When updating database would it be viable to use Distributed Locking? I heard some developers praise the use of FIFO queues like SQS, RabbitMQ and the like!

Out of context, what's the keyboard using ? That sounded nice. : ) as always top video. Thanks for getting and keeping my job.

Nice job! I have an issue with production app. I need your advice. Now, I have a transient class which receives an update request. The request may be single or multi which means parallel tasks. Inside this class, I used a method to write some .json file and shut down the running up to continue update on the another local app. Here is the problem, in case multiple requests how can I avoid parallel threds using a specific method? I tried with semaphoreSlim and locks but it doesn’t work perfectly

I run into those usually when I have database update statements in my code.

Impressive ! Thank you Anton. At 12:15, could we bypass this effect by using *ConfigureAwait(false)* ?

I’m assuming interlock would work too.

Thank you

What is the difference between using the semaphore vs. redis-conditional, assuming only one thread active on the protected resource?

awesome content, gg!

awesome content! separates men from the boys

thanks for it. I learnt semaphore and mutex :) why you didn't try Concurrent something is there any solution with it? I would like to try, I have just finished the video :)

Hi Anton, what IDE are you using in this video?

I wish I was as smart as you! 😂

I respect your knowledge and expertise, but first example is totally wrong. var resource = 0; // Copy value 0 to resource variable var worker1 = resource; // Copy value 0 to worker1 variable var worker2 = resource; // Copy value 0 to worker2 variable worker1++; // Increase 0 by 1 and copy it to worker1, which is 1 worker2++; // Increase 0 by 1 and copy it to worker2, which is 1 resource = worker1; // Copy value of worker1 to resource, which is 1 resource = worker2; // Copy value of worker2 to resource, which overwrites the assignment above, which is 1 Console.WriteLine(resource); // Of course it will output 1, I really wonder what did you expect? I am ashamed of myself for explaining this concept as if it is not known already, but: C#, passes value types by copying their values, not their references. In this context, you cannot directly use resource variable. You can only copy it's current value. This is why you cannot get a race condition out of this.

Are you using Linux?

you've only explained half the topic, you've shown the problem but not the solution

Lmao, that Java ripoff's compiler can't even detect race conditions?