Not enough memory resources are available to process this command. (Exception from HRESULT: 0x80070008)

[nblackburn77]

Hello,

A couple of our customers are having intermittent problems when they use our application to create a CefSharp browser. This is the exception caught by our application:

%% x.DEVELOPER.CONFIGURATION : Tue May 04 13:56:18.225 2021 [x.XmlSerialization.XmlSerializationContext.ReportError:0]
Error:
System.TypeInitializationException: The type initializer for 'x.Controls.WebBrowser' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'CefSharp.Core.dll' or one of its dependencies. Not enough memory resources are available to process this command. (Exception from HRESULT: 0x80070008)
   at x.Controls.WebBrowser2..cctor()
   --- End of inner exception stack trace ---
   at System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType objectType)
   at System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(RuntimeType serverType)
   at System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(RuntimeType serverType, Object[] props, Boolean bNewObj)
   at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
   at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(Type type)
   at x.XmlSerialization.MarkupContext.Deserialize(String name, XmlReader reader) in C:\P4\Net\x\XmlSerialization\MarkupContext.cs:line 431
   at x.XmlSerialization.XmlSerializationContext.ParseXml(XmlReader reader) in C:\P4\Net\x\XmlSerialization\XmlSerializationContext.cs:line 159
   at x.DesktopManagement.OverrideSerializationContext.Deserialize(String name, XmlReader reader) in C:\P4\Net\x\DesktopManagement\ISupportOverride.cs:line 121
   at x.XmlSerialization.XmlSerializationContext.ParseXml(XmlReader reader) in C:\P4\Net\x\XmlSerialization\XmlSerializationContext.cs:line 159
   at x.XmlSerialization.XmlSerializationContext.Load(XmlReader xmlReader, Uri url) in C:\P4\Net\x\XmlSerialization\XmlSerializationContext.cs:line 194

Our WebBrowser class extends CefSharp as follows:
public partial class WebBrowser : ChromiumWebBrowser

The problem is intermittent so I believe we can rule out a dependency issue.

What I've confirmed so far:

• There's nothing in the CefSharp log file, however, we have LogSeverity set to Warning.
• There's nothing in the Windows event log at the time of the problem.
• There's no %USERPROFILE%\AppData\Local\CrashDumps folder.
• The customer is using another GUI intensive application.
• Our application is 32-bit but it's using < 500MB of memory at the time of and process handle usage etc. are all fine.

I assume this is a resource problem, possibly Windows desktop heap, and that's why no errors are being logged to the event log etc. by CefSharp.

I've looked at unmanaged-crashes-when-the-process-dies, but as it's potentially a resource problem would a crash be reported? Or does anyone have any other suggestions on how to diagnose this?

Our application is WinForms, .NET Framework 4.7.2 using CefSharp 73.1.130.

Thanks for your help.

[amaitland]

• Our application is 32-bit

Make sure your application is LargeAddressAware. See https://github.com/cefsharp/CefSharp/wiki/General-Usage#win32-out-of-memory

• using < 500MB of memory at the time of and process handle usage etc. are all fine.

What software did you use to get the memory usage? What value is less than 500mb exactly? Does the machine have enough free memory?

See https://mahdytech.com/2019/01/05/task-manager-memory-info/

System.TypeInitializationException: The type initializer for 'x.Controls.WebBrowser' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'CefSharp.Core.dll' or one of its dependencies. Not enough memory resources are available to process this command. (Exception from HRESULT: 0x80070008)

Best guess would be that the process is attempting to load libcef.dll and failed. It's a 70-90mb dll depending on version, plus there's the additional bin/pak/dll files.

I've looked at unmanaged-crashes-when-the-process-dies, but as it's potentially a resource problem would a crash be reported?

Based on the stack trace it's unlikely loading libcef.dll.pdb would be useful. It's not clear that libcef.dll has actually been loaded successfully.

[nblackburn77]

Thanks @amaitland for your reply.

Our application is not LargeAddressAware, it looks like that would be the best thing to try.

I estimated the memory usage of our application based on the size of the full dump file that was generated when our application crashed, it was 276MB. The customer machine had 60GB of physical memory free when our application was started (we log that on start-up).