CMS breaks up after installing GUI Extension that uses CoreService (Web 8.5)

Question

We upgraded our environment from Web 8.1.1 to Web 8.5. We have a few GUI Extensions that uses CoreService (2015) working in one environment. We made a clean install of 8.5 and tried to re-install the GUI Extension, but after we enable it, the CMS gets broken and we need to do an IISRESET.

In Chrome Console I can only see this:

http://localhost/WebUI/Editors/Base/Views/Authentication/Authentication.aspx failed to load within 10 seconds Navigation.js:1

I've enabled Failed Trace Logs in IIS and the only Warning I got is this one:

I also tried to ping CoreService with WCF Test Client and got this:

The CMS shows while broken: The webpage at

http://localhost/WebUI/Editors/Base/Views/Authentication/Authentication.aspx might be temporarily down or it may have moved permanently to a new web address.

And sometimes:

The webpage at

http://localhost/WebUI/Editors/Base/Views/ProxyView/ProxyView.aspx?pagePath=~/../CME/Views/Welcome/Welcome.aspx might be temporarily down or it may have moved permanently to a new web address.

If I remove the extension from system.config it works again (after IISRESET).

I also set log level to DEBUG in system.config but nothing is logged.

Any idea?

Answer 1

Finally it was the override of Name property

The code had this

public override string Name
{
    get { return Name; }
}

Which worked in Web8! But seems now something is actually using it so it was recursively called.

using this

public override string Name
{
    get
    {
        Type itsMe = GetType();
        return string.Concat(itsMe.Namespace, ".", itsMe.Name);
    }
}

Made it work.