HttpPost with entity as parameter stuck in an infinite loop? (rc2-final)

[HairyPortal]

Consider a call to a simple post action like this

    [HttpPost]
    public async Task<IActionResult> Create(Organization data)
    {
        return NotFound();
    }

The call is unsuccessful and cause memory consumption go up wildly (1 GB every 30 second) and it never stop and consume all my memory.

It looks like the call is stuck in an infinite loop of some sort.

After some experiment, I found out that only classes that I use in DbContext cause this infinite loop. Swapping "Organization" (which is a class I used in DbContext) with other class like the one I used as viewmodel dose not cause this.

I'm not sure what I did wrong because in rc1 everything works just fine.

[xrkolovos]

I am having the same issue. I have a complex ef model, and i get as parameter in the post method one object of this model. It's like the framework trying to discover all the dependancies with this model and iterates through the whole model.

i am running on net46

[xrkolovos]

i am testing this bug for like 4 hours. After adding more complexity(i mean more objects with more connections between them) the time that takes to execute the method rises. At a given number of objects (with connections between them), the app breaks and it nevers hit the method inside the mvc controller. After that also we get the memory leak.

The number of the classes in my model is only 24. Houston, We've Got a Problem.

[fglebel]

I am also stuck in a loop. Unable to advance. Was working fine in RC1. Unable to hit breakpoint.

I am using EFCore. Did a database first scaffold.

[Bartmax]

Just in case, a word from the MS team will be great.

[rynowak]

Just in case, a word from the MS team will be great.

Could one of you experiencing the issue grab a call-stack of where MVC is spending most of its time?

[xrkolovos]

can you provide some info how to get one? Because i don't know how. After i am skipping the last line of the constuctor the stact trace window is empty.

[xrkolovos]

you only need an complex model with about 20-25 classes and relations between them. if you need one, i can created for you.

[fglebel]

Since I cannot hit the breakpoint, call stack is empty. I am trying to reproduce from scratch.

[xrkolovos]

@fglebel how big is your model? (how many classes do you have related)

[xrkolovos]

I created a sample project that demonstrate this bug in OrderNoteController.cs with 2 methods. One with a complex class and one with a Viewmodel Class.

I used the domain model of this project https://github.com/smartstoreag/SmartStoreNET/tree/4db9e2f6f24eea13402fa869a5d88f5b20ee6c52/src/Libraries/SmartStore.Core/Domain

Decisions.WebCoreUi.zip

[fglebel]

I was able to reproduce quite easily.

• I created a new ASP.NEW Core Web Application (.NET Core) web application with Windows Authentication from VS Studio 2015 Update 2.
• Installed EF Core
• Did a dotnet ef dbcontext scaffold of my SqlServer database into a Models folder
• Added 1 index view, 1 edit view and 1 controller

startup.cs
for services:
added a dbcontext
added an authorize policy

Nothing changed inside app

project.json
added dependencies:
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview1-final",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.0-rc2-final"

added tools:
"Microsoft.EntityFrameworkCore.Tools": {
"imports": [ "portable-net451+win8" ],
"version": "1.0.0-preview1-final"
}

Here are all the references:

[fglebel]

@fglebel how big is your model? (how many classes do you have related)

@xrkolovos I have about 200

[xrkolovos]

Can we hope for a quick fix, in a new AspNetCore.Mvc Package, or a quick solution adding a class that impements a custom binding functionality overwriting the default one?

Any more info or workaround from the team will be helpful because we are stuck, and the next thing to do is migrate back to rc1.

[webeg]

Just in case, a word from the MS team will be great.

Could one of you experiencing the issue grab a call-stack of where MVC is spending most of its time?

@rynowak any news on this one?

[rynowak]

I'm investigating this currently, will update here when I know more