Hello, support!

We have created WPF application. It contains browser element:
=================================
<UserControl x:Class="Com.Altuera.Yota.EOK.EOKView"
x:Name="EOKControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:local="clr-namespace:Com.Altuera.Yota.EOK"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:eo="http://schemas.essentialobjects.com/wpf/">
....
<Grid Height="{Binding ElementName=EOKControl, Path=ActualHeight}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
....
<eo:WebControl Grid.Row="1" x:Name="webControl"/>
....
</Grid>
</UserControl>
=================================

In addition, in Create() method of our main View we have the next code (trying to load particular request in WebView with PreloadTask):
=================================
PreloadTask preloadTask = WebView.Preload(600, 800, "about:blank", (newWebView, arg) =>
{
if (newWebView == null)
{
return null;
}

newWebView.LoadFailed += webView_LoadFailed;
newWebView.ConsoleMessage += webView_ConsoleMessage;
newWebView.NeedClientCertificate += webView_NeedClientCertificate;
newWebView.CertificateError += webView_CertificateError;
newWebView.NeedCredentials += webView_NeedCredentials;
newWebView.NewWindow += webView_NewWindow;
newWebView.LoadCompleted += webView_LoadCompleted;
newWebView.BeforeRequestLoad += webView_BeforeRequestLoad;
newWebView.BeforeNavigate += webView_BeforeNavigate;
newWebView.AfterReceiveHeaders += webView_AfterReceiveHeaders;
newWebView.RenderUnresponsive += webView_RenderUnresponsive;

EO.WebBrowser.Request request = new EO.WebBrowser.Request(url);
request.Method = "POST";

NavigationTask navigationTask = newWebView.LoadRequest(request);

BackgroundWorker internalWorker = new BackgroundWorker();
internalWorker.DoWork += new DoWorkEventHandler((object o, DoWorkEventArgs args) =>
{
if (!navigationTask.WaitOne(this.eokLoadTimeout))
{
args.Result = bool.FalseString;
}
else
{
args.Result = bool.TrueString;
}
});
internalWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler((object o, RunWorkerCompletedEventArgs args) =>
{
if (args.Error != null)
{
Dispatcher.BeginInvoke((System.Action)(() =>
{
this.webControl.WebView.StopLoad();
}));
return;
}

if (args.Cancelled)
{
return;
}

if (args.Result != null)
{
string result = (string)args.Result;
if (result != null)
{
if (result.Equals(bool.FalseString))
{
Dispatcher.BeginInvoke((System.Action)(() =>
{
this.webControl.WebView.StopLoad();
}));
}
}
}
});
internalWorker.RunWorkerAsync();

Dispatcher.BeginInvoke((System.Action)(() =>
{
this.webControl.WebView = newWebView;
}));
return null;
}, null);

BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler((object o, DoWorkEventArgs args) =>
{
preloadTask.WaitOne();
});
worker.RunWorkerAsync();
=================================

This code works well, but sometimes we have EO.Base.Runtime exception:
17-12-07 14:04:31.177 [ 1]

Can you help us with this problem? Maybe it is something wrong in our logic?

EO libs version: 16.2.93.0

Please advice.

Sincerely,
Dmitry Anninkov.

May I request someone reduce or delete the stack trace in this question as it turns search results into hell.

Hi,

It appears that you are already handling CrashDataAvailable and collecting crash logs. Can you send the crash log to us so that we can take a look? See here for our email address:

https://www.essentialobjects.com/forum/test_project.aspx

Thanks!

Hi,

The file you sent to us does not appear to be our log data. See here for what we need:

https://www.essentialobjects.com/doc/common/crash_report.aspx

The data you sent to us must be exactly from e.Data. You can't add anything else to it.

Thanks!

Hi,

The crash log indicates that this occurs while initializing GPU. Does this problem occurs always and only occur on specific systems?

Thanks!

Hi,

There are numerous different scenarios that can cause Chromium browser engine to crash and most of them originates from the browser engine. For those crashes it is not possible for us to address them due to the size of the Chromium project. For such cases, we usually wait for the Chromium team to fix them first. However due to our crash log ability, sometimes we can see where it crashed and maybe able to suggest ways to avoid/workaround it, that would be our main focus for these type of crashes.

Another type of crashes originates from our code, for those crashes we can usually trace to the bottom of it and fix it.

In your case, the problem you observed can actually be multiple problems and they all resulted in a crash in the browser engine. The one crash log you sent to us indicate a problem with initializing GPU. You can try to collect multiple logs and send them to us so that we can see if they are all the same problem or they are all different kind of problem, or actually the same problem shows up in all different kind of places.

Thanks!

Hello, support!

At your request I send you the crash data that was able to collect.

Thanks a lot!

Hi,

According to your recommendations we set DisableGPU property to true to disable GPU:
EO.WebBrowser.Runtime.DisableGPU = true;

We have collected new crash files and have sent it to your email. Do you observe the mentioned problem with GPU?

Thanks!

Hi,

You will receive this error when the WebControl has not been destroyed properly. Try to call this method explicitly in the same thread:

https://www.essentialobjects.com/doc/eo.wpf.webviewhost.dispose.aspx

That should prevent this error.

Thanks!