Sitecore 9.0.1 ships with new renderings for EXM (e.g. "Footer" or "Header"). Chances are that projects want to create rendering with the same name and run into this exception. We might want to add the possibility to ignore certain rendering paths (e.g. config setting).
Addition: It would be helpful to enrich the exception message with information of which renderings are duplicates. Catch exception and rethrow.
Exception:
Error Rendering View: /Views/Shared/NitroLayout.cshtml: Error while rendering view: '/Views/Shared/NitroLayout.cshtml' (model: 'Sitecore.Mvc.Presentation.RenderingModel, Sitecore.Mvc').
at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)
at Sitecore.Mvc.Pipelines.Response.RenderRendering.ExecuteRenderer.Render(Renderer renderer, TextWriter writer, RenderRenderingArgs args)
Inner Exception: An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary2.Insert(TKey key, TValue value, Boolean add) at NitroNet.Sitecore.Rendering.SitecoreRenderingRepository.GetAllRenderings() at NitroNet.Sitecore.Rendering.SitecoreRenderingRepository.GetRenderingId(String renderingName) at NitroNet.Sitecore.SitecoreMvcNitroTemplateHandler.RenderComponent(RenderingParameter component, RenderingParameter skin, RenderingParameter dataVariation, Object model, RenderingContext context) at NitroNet.ViewEngine.TemplateHandler.ComponentHelperHandler.Evaluate(Object model, RenderingContext context, IDictionary
2 parameters)
at lambda_method(Closure , RenderingContext , Object )
at NitroNet.ViewEngine.ViewEngines.VeilViewEngine.VeilView1.Render(T model, RenderingContext context) at NitroNet.ViewEngine.ViewEngines.VeilViewEngine.VeilViewAdapter
1.Render(Object model, RenderingContext context)
at NitroNet.Sitecore.SitecoreNitroNetViewEngine.SitecoreViewAdapter.Render(Object model, RenderingContext context)
at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)