WindowsCommunityToolkit 🚀 - The component cannot be found if Image Url 404

Where do you have this issue?

deltakosh on 16 Dec 2016

I made an ItemTemplate with ImageEx. When I loaded list Images from my server. If all image ok(not 404) No exception. But If list Images have a url 404. I got that exception.

hoangwy on 16 Dec 2016

Ok understood. I'll check when I'll be back in January:)

deltakosh on 16 Dec 2016

:(. My app running on store with 1 million users. 200 crashs per day :(

hoangwy on 16 Dec 2016

Ok :) you won! Let me try to ping the team

deltakosh on 16 Dec 2016

More info
Crashed Thread

0 System.Exception : The component cannot be found. (Excep_FromHResult 0x88982F50)
1 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
2 at SharedLibrary!+0x36fd1b
3 at SharedLibrary!+0x36fbe9
4 at SharedLibrary!+0x36fbb9
5 at NCT_UWP!+0xa6201f
6 --- End of stack trace from previous location where exception was thrown ---
7 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
8 at SharedLibrary!+0x401cbf
9 at SharedLibrary!+0x3ce85f

hoangwy on 16 Dec 2016

@hoangwy Do you have some band-width to help fix this issue?

skendrot on 16 Dec 2016

Yes. I will give you anything if you can for fix this issue

hoangwy on 16 Dec 2016

👍1

Sorry, I meant would you be able to submit a pull request for the issue?

skendrot on 16 Dec 2016

👍1

@deltakosh @skendrot I don't mind looking into this over christmas

hermitdave on 16 Dec 2016

HttpClient returns COMException when it encounters 404 etc

hermitdave on 16 Dec 2016

I changed ImageEx to Image and everything work fine. No exception. But I want to cache my Image

hoangwy on 16 Dec 2016

@hoangwy I will fix along with timeout option

hermitdave on 16 Dec 2016

And with this exception. It make my app random crash. I have 100 000 active user per day but just 200 crashs.

hoangwy on 16 Dec 2016

I've started looking at ImageCache.. Hoping to fix perf issues along with handling COMExceptions thrown by HttpClient

hermitdave on 29 Dec 2016

Really cool! I'm using it in Collecto and I do not see perf issues so far

deltakosh on 29 Dec 2016

@deltakosh I see image loads taking forever with post 1.2 nugets and proj references. need to figure out why. I revert to 1.2 and all is good again.

hermitdave on 29 Dec 2016

@hoangwy I have debugged this and it is being handled. I have however tweaked it so it now throws FileNotFound exception

hermitdave on 1 Jan 2017

If I have alot of Image url with 404, I'm afraid of it's will be random crash if FileNotFound exception. did you tested if you run loop(for) with more than 1000 image 404 url ?
sorry my bad English.
Thanks for your support!

hoangwy on 3 Jan 2017

I can give that a go.. I really need to create a Flickr test code as I'm always using my work app ☺

hermitdave on 3 Jan 2017

@hoangwy I modified my code to generate invalid Url for every single image


[JsonProperty("url")]
public string OriginalUrl { get; set; }

[JsonIgnore]
public string Url
{
    get { return this.OriginalUrl.Replace("i.dailymail.co.uk/i/pix", "idailymailcoukipix"); }
}

[JsonIgnore]
public Uri Uri
{
    get { return new Uri(this.Url); }
}

This resulted in ImageEx displaying placeholders only. My app literally shows hundreds of images and I browsed various sections fully. Not a single crash.

The app also try to PreCache image using ImageCache independently and that did not generate any errors either

hermitdave on 3 Jan 2017

having said that I didn't check in release mode.. could be a dotnet native issue.. let me verify that as well

hermitdave on 3 Jan 2017

Hi,
You're hero!
Thanks so much!

hoangwy on 3 Jan 2017

Hi @hoangwy I cant really replicate the crash. Having said that the thing to remember that the Stack Trace once compiled to Dotnet Native is almost meaningless. Like I said I have noticed this is stack too.

I will keep an eye on it. For now if you want to validate the same, enable .NET Native on debug mode so you get the same feel and you might be able to catch whatever is causing that issue.
dotnetnative

hermitdave on 3 Jan 2017

I just debug my app

hoangwy on 3 Jan 2017

see if that exception is handled and that it can keep going.. check the stack to ensure that its being raised in the right place etc

hermitdave on 3 Jan 2017

what I meant was the having handled that in the modified codebase, I could go on an on without the app crashing (I was using release mode and not attached to the debugger)

hermitdave on 3 Jan 2017

If I click "continue" my app work fine. But some user got crash. I think it depend on that machine. If more exceptions. System will be killed my app

hoangwy on 3 Jan 2017

@hoangwy like I said stack from crash logs is pretty dismal once you use .NET Native. Throwing expcetions and catching them is how the whole thing works.. If some exception is causing crash its very like that it is being bubbled up elsewhere not here.

The only way to catch is have a reproducible scenario where you can repeat the actions.. HockeyApp and Crittercism allow breakcrumps etc that could help further

hermitdave on 3 Jan 2017

Search for HRESULT 0x88982F50 shows that it happens when BitmapLoader can't load the image. Now we check the stream for non zero value. If its zero, we throw FileNotFound exception and we are most likely to avoid the BitmapLoader exception. Wait for this to merge and then try the myget package

hermitdave on 3 Jan 2017

Merged! You can check now on prerelease repo

deltakosh on 3 Jan 2017

I checked on Nuget with Prerelease(checked) but I dont see new update

hoangwy on 4 Jan 2017

Try configuring mygwt in package manager https://dotnet.myget.org/gallery/uwpcommunitytoolkit

hermitdave on 4 Jan 2017

50 images
Exception thrown: 'System.IO.FileNotFoundException' in Microsoft.Toolkit.Uwp.UI.dll
Additional information: IO_FileNotFound