Import fails on uSync import.

[KevinJump]

[Reported via Jumoo Website]

I am getting an exception every time I start Umbraco. The stack trace shows that usync tries to publish an item calling Umbraco code. This ends up in an error because httpContext is null. I have recreated it in a clean umbraco. I have recreated with * Umbraco 15.0.0 and uSync 15.0.0 * Umbraco 15.2.1 and uSync 15.1.2 Same error.

My usync config looks like this.

Notice "ImportAtStartup": "Settings,Content"

{
   "uSync":{
      "Settings":{
         "RootFolder":"uSync/v15/",
         "DefaultSet":"Default",
         "ImportAtStartup":"Settings,Content",
         "ExportAtStartup":"None",
         "ExportOnSave":"Settings",
         "UiEnabledGroups":"All",
         "ReportDebug":false,
         "AddOnPing":true,
         "FailOnMissingParent":false,
         "CacheFolderKeys":true,
         "ShowVersionCheckWarning":true,
         "CustomMappings":{
            
         },
         "EnableHistory":true,
         "BackgroundNotifications":false
      },
      "Sets":{
         "Default":{
            "Enabled":true,
            "HandlerGroups":[
               
            ],
            "DisabledHandlers":[
               "DomainHandler",
               "MediaHandler",
               "RelationTypeHandler"
            ],
            "HandlerDefaults":{
               "Enabled":true,
               "Actions":[
                  
               ],
               "UseFlatStructure":true,
               "GuidNames":false,
               "FailOnMissingParent":false,
               "Group":"",
               "Settings":{
                  
               }
            },
            "Handlers":{
               
            }
         }
      }
   }
}

From the log:

[10:50:17 INF] Application started. Press Ctrl+C to shut down. 
[10:50:17 INF] Hosting environment: Development
[10:50:17 INF] Content root path: C:\p\dr\UmbracoInstalls\umbraco-20250218103738-15.2.0 
[10:50:17 INF] uSync: Running Import at startup Settings,Content 
[10:50:19 INF] Adding examine event handlers for 3 index providers. 
[10:50:19 WRN] Notifications can not be sent, no site URL is set (might be during boot process?) 
[10:50:19 WRN] Notifications can not be sent, no site URL is set (might be during boot process?) 
[10:50:22 INF] Document ************* (id=1129) has been published. 
[10:50:23 WRN] Notifications can not be sent, no site URL is set (might be during boot process?) 
[10:50:23 WRN] [ContentHandler] ImportElement Failed : 
System.AggregateException: One or more errors occurred. (One or more errors occurred. (HttpContext is null)) 
---> System.AggregateException: One or more errors occurred. (HttpContext is null) 
---> System.InvalidOperationException: HttpContext is null 
 at Umbraco.Extensions.HttpContextAccessorExtensions.GetRequiredHttpContext(IHttpContextAccessor httpContextAccessor) 
 at Umbraco.Cms.Web.Common.AspNetCore.AspNetCoreRequestAccessor.GetFormValue(String name) 
 at Umbraco.Cms.Web.Common.AspNetCore.AspNetCoreRequestAccessor.GetRequestValue(String name) 
 at Umbraco.Cms.Core.Routing.ContentFinderByPageIdQuery.TryFindContent(IPublishedRequestBuilder frequest) 
 at Umbraco.Cms.Core.Routing.PublishedRouter.FindPublishedContent(IPublishedRequestBuilder request) 
 at Umbraco.Cms.Core.Routing.PublishedRouter.TryRouteRequest(IPublishedRequestBuilder request) 
 at Umbraco.Cms.Core.Routing.PublishedRouter.RouteRequestAsync(IPublishedRequestBuilder builder, RouteRequestOptions options) 
 at Umbraco.Extensions.UrlProviderExtensions.DetectCollisionAsync(ILogger logger, IContent content, String url, String culture, IUmbracoContext umbracoContext, IPublishedRouter publishedRouter, ILocalizedTextService textService, IVariationContextAccessor variationContextAccessor, UriUtility uriUtility, IPublishedContentCache contentCache, IDocumentNavigationQueryService navigationQueryService) 
 at Umbraco.Extensions.UrlProviderExtensions.GetContentUrlsByCultureAsync(IContent content, IEnumerable`1 cultures, IPublishedRouter publishedRouter, IUmbracoContext umbracoContext, IContentService contentService, ILocalizedTextService textService, IVariationContextAccessor variationContextAccessor, ILogger logger, UriUtility uriUtility, IPublishedUrlProvider publishedUrlProvider, IPublishedContentCache contentCache, IDocumentNavigationQueryService navigationQueryService) 
 at Umbraco.Extensions.UrlProviderExtensions.GetContentUrlsAsync(IContent content, IPublishedRouter publishedRouter, IUmbracoContext umbracoContext, ILanguageService languageService, ILocalizedTextService textService, IContentService contentService, IVariationContextAccessor variationContextAccessor, ILogger`1 logger, UriUtility uriUtility, IPublishedUrlProvider publishedUrlProvider, IPublishedContentCache contentCache, IDocumentNavigationQueryService navigationQueryService) 
 at Umbraco.Cms.Core.Events.AddUnroutableContentWarningsWhenPublishingNotificationHandler.HandleAsync(ContentPublishedNotification notification, CancellationToken cancellationToken) 
 at Umbraco.Cms.Core.Events.INotificationAsyncHandler`1.HandleAsync(IEnumerable`1 notifications, CancellationToken cancellationToken) 
 at Umbraco.Cms.Core.Events.EventAggregator.PublishCoreAsync[TNotification](IEnumerable`1 allHandlers, IEnumerable`1 notifications, CancellationToken cancellationToken) 
 at Umbraco.Cms.Core.Events.NotificationAsyncHandlerWrapperImpl`1.HandleAsync[TNotification,TNotificationHandler](IEnumerable`1 notifications, CancellationToken cancellationToken, ServiceFactory serviceFactory, Func`4 publish) 
 at Umbraco.Cms.Core.Events.EventAggregator.PublishNotificationsAsync[TNotification,TNotificationHandler](IEnumerable`1 notifications, CancellationToken cancellationToken) --- End of inner exception stack trace --- 
 at System.Threading.Tasks.Task.WaitAllCore(ReadOnlySpan`1 tasks, Int32 millisecondsTimeout, CancellationToken cancellationToken) 
 at System.Threading.Tasks.Task.WaitAll(ReadOnlySpan`1 tasks) 
 at Umbraco.Cms.Core.Events.EventAggregator.Publish[TNotification,TNotificationHandler](IEnumerable`1 notifications) 
 at Umbraco.Cms.Core.Events.ScopedNotificationPublisher`1.PublishScopedNotifications(IList`1 notifications) 
 at Umbraco.Cms.Core.Events.ScopedNotificationPublisher`1.ScopeExit(Boolean completed) 
 at Umbraco.Cms.Core.Scoping.CoreScope.HandleScopedNotifications() 
 at Umbraco.Cms.Infrastructure.Scoping.Scope.TryFinally(Action[] actions) --- End of inner exception stack trace --- 
 at Umbraco.Cms.Infrastructure.Scoping.Scope.TryFinally(Action[] actions) 
 at Umbraco.Cms.Infrastructure.Scoping.Scope.RobustExit(Boolean completed, Boolean onException) 
 at Umbraco.Cms.Infrastructure.Scoping.Scope.DisposeLastScope() 
 at Umbraco.Cms.Infrastructure.Scoping.Scope.Dispose() 
 at Umbraco.Cms.Core.Services.ContentService.Publish(IContent content, String[] cultures, Int32 userId) 
 at Umbraco.Cms.Core.Services.ContentService.Publish(IContent content, String[] cultures, Int32 userId) 
 at USync.Core.Serialization.Serializers.ContentSerializer.PublishItem(IContent item, Int32 userId) 
 at USync.Core.Serialization.Serializers.ContentSerializer.DoSaveOrPublish(IContent item, XElement node, SyncSerializerOptions options) 
 at USync.Core.Serialization.Serializers.ContentSerializer.DeserializeCoreAsync(XElement node, SyncSerializerOptions options) 
 at USync.Core.Serialization.SyncSerializerRoot`1.DeserializeAsync(XElement node, SyncSerializerOptions options) 
 at USync.BackOffice.SyncHandlers.SyncHandlerRoot`2.DeserializeItemAsync(XElement node, SyncSerializerOptions options) 
 at USync.BackOffice.SyncHandlers.SyncHandlerRoot`2.ImportElementAsync(XElement node, String filename, HandlerSettings settings, uSyncImportOptions options) 


[10:50:23 INF] uSync Import: 10 handlers, processed 122 items, 3 changes in 5520ms 
[10:50:23 INF] uSync: Startup Complete 5700ms 

Does this look like a uSync issue or an Umbraco issue? Or could I have done something wrong?

[KevinJump]

Investigating, can't currently reproduce, but there might be a specific set of circumstances where this happens.

[bielu]

@KevinJump I think I might know what's the issue, if you use blocks in rte they require http context to be correctly converted to output html, and i noticed sometimes umbraco decide to do it in background threads and it gives same exception but different source (if you publish from scheduled publishes as example!)
the problematic code is here:
https://github.com/umbraco/Umbraco-CMS/blob/88657c1bb01ce2869f1767a2f0cd5bd9f9d0d1f7/src/Umbraco.Infrastructure/PropertyEditors/ValueConverters/RteBlockRenderingValueConverter.cs#L223
the rendering partials require http context, there are ways to fake it but umbraco doesnt do it in core :)

[KevinJump]

thanks @bielu - that's intresting i will take a look (we have faked httpcontext in the past, so maybe its worth taking a look.

It sounds much more like a Umbraco problem to solve though, especially if its breaking scheduled publishing. and everything* else works in a background thread.