Excel hangs, waiting for CEF renderer process

[tomst]

We have a Windows application built with CEF 1916. For some weird reason, when using Excel for a few minutes while the application is running Excel starts to hang. Analyzing the wait chain in task manager indicates that it's waiting for a resource in the CEF renderer process:

Wait Chain

Screen Shot 2014-08-22 at 14.39.54.png (19.05 KiB) Viewed 5495 times

In this example, PID 2484 is a renderer running with the following args: ("--type=renderer", "--disable-delegated-renderer", "--disable-gpu", "--disable-threaded-compositing", "--no-sandbox", "--lang=en-US", "--lang=en-US", "--log-file=C:/Users/tom/Desktop/cef.log", "--log-severity=info", "--enable-pinch", "--disable-accelerated-compositing", "--enable-software-compositing", "--disable-gpu-compositing", "--channel=2200.1.737365922\358810346", "/prefetch:673131151")

There's nothing specific in the cef.log. I also created a memory dump for Excel and Visual Studio just says that the affected thread is in MSO.DLL (which unfortunately doesn't have any debugging symbols):

Stack trace

Screen Shot 2014-08-22 at 14.40.08.png (25.88 KiB) Viewed 5495 times

Has anyone had similar experiences with CEF? I'm not sure how to debug this issue further. I couldn't reproduce it with the cefclient.exe so far.

[Meghavi]

Hi,

Were you able to figure out anything for this issue.
I am having the same problem.

Thanks

[Cristiano]

Make sure to create your windows (CreateWIndow/CreateDialog, etc) after CefInitialize() Call.
I was having similar problem and solved this way.
I Hope may help you

[tomst]

We were able to solve it also. We are using Qt, and were initializing the all processes using QApplication, which caused problems with the CEF child processes. The fix was to use QCoreApplication in the child (renderer) processes, and QApplication only in the main UI process.