Multiple Web Browsers

[JanSamusQF]

What platform are you experiencing this issue on?

Windows

What architecture is your platform?

64-Bit

What version of UWB are you using?

Latest VoltstroUPM Release

What Unity version are you running?

2022.3.11f1

Describe what the issue you are experiencing is.

When using two Web Browsers the first one works fine while the second one throws the following error:

[Web Browser]: [Engine]: Uncaught exception occured in the entry point!
System.InvalidOperationException: Failed to initialize CEF runtime.
at Xilium.CefGlue.CefRuntime.Initialize(CefMainArgs, CefSettings, CefApp, IntPtr)
at UnityWebBrowser.Engine.Cef.Core.CefEngineControlsManager.Init(ClientControlsActions, EnginePopupManager)
at UnityWebBrowser.Engine.Cef.Core.UwbCefEngineEntry.EntryPoint(LaunchArguments, String[])
at VoltstroStudios.UnityWebBrowser.Engine.Shared.Core.EngineEntryPoint.<>c__DisplayClass15_0.

b__19(LaunchArguments parsedArgs)
UnityEngine.Logger:LogError (string,object)
VoltstroStudios.UnityWebBrowser.Logging.DefaultUnityWebBrowserLogger:Error (object) (at ./Library/PackageCache/dev.voltstro.unitywebbrowser@2.1.1/Runtime/Logging/DefaultUnityWebBrowserLogger.cs:36)
VoltstroStudios.UnityWebBrowser.Logging.ProcessLogHandler:HandleOutputProcessLog (object,System.Diagnostics.DataReceivedEventArgs) (at ./Library/PackageCache/dev.voltstro.unitywebbrowser@2.1.1/Runtime/Logging/ProcessLogHandler.cs:54)
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()

Is there anything i have to configure to allow for multiple instances?

Any additional info you like to provide?

I've updated to the current CEF Versions.

[Voltstro]

Ensure your communication layer is operating on different ports, and that either you have cache disabled, or change the cache path via WebBrowserClient.CachePath.

[JanSamusQF]

I am creating a separate TCPCommunicationLayer ScriptableObject for each Whiteboard with different ports (5555,5556) and (5557,5558)

private void InitializeCommunicationLayer()
{
  // Create and initialize the TCP communication layer
  var tcpCommunicationLayer = ScriptableObject.CreateInstance<TCPCommunicationLayer>();
  CheckPort();
  tcpCommunicationLayer.inPort = inPort;
  tcpCommunicationLayer.outPort = outPort;
  clientManager.browserClient.communicationLayer = tcpCommunicationLayer;
}

while it works for a single whiteboard, for a second one it always throws the [Web Browser]: [Engine]: Uncaught exception occured in the entry point Exception.
I set the Log Severity to Debug and saw that it eventhough i create the TCPLayer it outputs this log aswell:

[Web Browser]: [Engine]: No communication layer provided, using default TCP...
UnityEngine.Logger:Log (UnityEngine.LogType,string,object)
VoltstroStudios.UnityWebBrowser.Logging.DefaultUnityWebBrowserLogger:Debug (object) (at ./Library/PackageCache/dev.voltstro.unitywebbrowser@2.1.1/Runtime/Logging/DefaultUnityWebBrowserLogger.cs:26)
VoltstroStudios.UnityWebBrowser.Logging.ProcessLogHandler:HandleOutputProcessLog (object,System.Diagnostics.DataReceivedEventArgs) (at ./Library/PackageCache/dev.voltstro.unitywebbrowser@2.1.1/Runtime/Logging/ProcessLogHandler.cs:50)
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()

I disabled Cache for both and upped the timeout to 7000 with no changes. Is there anything i am missing?

[Voltstro]

I had a look into it quickly, looks like CEF has changed it behavior since I last experimented with running two instance.

What I did to get it working was to enable cache, and change WebBrowserClient.CachePath to a random path in the temp dir before UWB starts.

[JanSamusQF]

Awesome, thank you! This solved it.