Hi,

We're using Commerce 9.20, and Find 12.1.

I'm trying to register a custom partial router. I have removed the line in the commerce init module which registers the default router, and I'm using this code to register the custom one:

            var referenceConverter = ServiceLocator.Current.GetInstance();
            var contentLoader = ServiceLocator.Current.GetInstance();
            var commerceRootContent = contentLoader.Get(referenceConverter.GetRootLink());

            var partialRouteHandler = context.Locate.Advanced.GetInstance();
            var hierarchicalCatalogPartialRouter = new CustomHierarchicalPartialRouter(() => SiteDefinition.Current.StartPage, commerceRootContent);
            partialRouteHandler.RegisterPartialRouter(new PartialRouter(hierarchicalCatalogPartialRouter));

Here is the router code - as you can see, it's supposed to do nothing at the moment:

    public class CustomHierarchicalPartialRouter : HierarchicalCatalogPartialRouter
    {
        private readonly IContentLoader _contentLoader;
        private readonly ILinksRepository _linksRepository;
        private readonly ReferenceConverter _referenceConverter;

        public CustomHierarchicalPartialRouter(
            Func routeStartingPoint,
            CatalogContentBase commerceRoot)
            : base(routeStartingPoint,
                commerceRoot,
                false,
                ServiceLocator.Current.GetInstance(),
                ServiceLocator.Current.GetInstance(),
                ServiceLocator.Current.GetInstance(),
                ServiceLocator.Current.GetInstance(),
                ServiceLocator.Current.GetInstance(),
                ServiceLocator.Current.GetInstance>())
        {
            this._contentLoader = ServiceLocator.Current.GetInstance();
            this._linksRepository = ServiceLocator.Current.GetInstance();
            this._referenceConverter = ServiceLocator.Current.GetInstance();
        }
        public override PartialRouteData GetPartialVirtualPath(CatalogContentBase content, string language, RouteValueDictionary routeValues, RequestContext requestContext)
        {
            return base.GetPartialVirtualPath(content, language, routeValues, requestContext);
        }
    }

I was hoping that this would have no net effect, but it does - the Find indexer stops working. I'm getting errors like this in the Find indexing job:

An exception occurred while indexing content 1073741865__CatalogContent: Exception has been thrown by the target of an invocation. (see log for more information)

When I have a look in the log as the error suggests, I get the stack trace below. Am I registering the router correctly?

Stack Trace:

System.ArgumentNullException: The provided content link does not have a value.
Parameter name: contentLink
at EPiServer.Core.DefaultContentLoader.Get[T](ContentReference contentLink, LoaderOptions loaderOptions)
at EPiServer.Web.Routing.Segments.NodeSegment.GetVirtualPathSegment(RequestContext requestContext, RouteValueDictionary values)
at EPiServer.Web.Routing.Segments.NodeSegment.GetVirtualPathSegment(RequestContext requestContext, RouteValueDictionary values, HashSet`1 usedValues)
at EPiServer.Web.Routing.ContentRoute.AddVirtualPathFromSegments(StringBuilder virtualPath, RequestContext requestContext, RouteValueDictionary values, HashSet`1 usedValues, Int32 lastNonDefaultIndex)
at EPiServer.Web.Routing.ContentRoute.GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
at EPiServer.Web.Routing.DefaultUrlResolver.GetUrlFromRoute(ContentReference contentReference, String language, RouteValueDictionary routeValues, RequestContext requestContext)
at EPiServer.Web.Routing.DefaultUrlResolver.GetVirtualPathInternal(ContentReference contentLink, String language, VirtualPathArguments arguments)
at EPiServer.Web.Routing.UrlResolver.GetUrl(ContentReference contentLink, String language)
at EPiServer.Find.Commerce.CommerceUnifiedSearchSetUp.GetContentUrl(ContentReference contentLink)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at EPiServer.Find.UnifiedSearch.IndexProjection.GetUrl(Object o)
at EPiServer.Find.DelegateValueProvider`2.GetValue(Object target)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at EPiServer.Find.Api.BulkActionConverter.WriteJson(JsonWriter writer, Object value, JsonSerializer serializer)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable(JsonWriter writer, JsonConverter converter, Object value, JsonContract contract, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
at EPiServer.Find.Json.Serializer.SerializeToTextWriter(JsonSerializer serializer, Object value, TextWriter textWriter)
at EPiServer.Find.Json.Serializer.SerializeObjectsToJsonRequest(JsonSerializer serializer, IJsonRequest jsonRequest, IEnumerable values)
at EPiServer.Find.Api.BulkCommand.Execute()
at EPiServer.Find.Cms.ContentIndexer.IndexWithRetry(IContent[] contents, Int32 maxRetries)
at EPiServer.Find.Cms.ContentIndexer.Index(IEnumerable`1 content, IndexOptions options)
at EPiServer.Find.Cms.ContentIndexer.IndexBatch(IEnumerable`1 content, Action`1 statusAction, Int32& numberOfContentErrors, Int32& indexingCount)
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: The provided content link does not have a value.
Parameter name: contentLink
at EPiServer.Core.DefaultContentLoader.Get[T](ContentReference contentLink, LoaderOptions loaderOptions)
at EPiServer.Web.Routing.Segments.NodeSegment.GetVirtualPathSegment(RequestContext requestContext, RouteValueDictionary values)
at EPiServer.Web.Routing.Segments.NodeSegment.GetVirtualPathSegment(RequestContext requestContext, RouteValueDictionary values, HashSet`1 usedValues)
at EPiServer.Web.Routing.ContentRoute.AddVirtualPathFromSegments(StringBuilder virtualPath, RequestContext requestContext, RouteValueDictionary values, HashSet`1 usedValues, Int32 lastNonDefaultIndex)
at EPiServer.Web.Routing.ContentRoute.GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
at EPiServer.Web.Routing.DefaultUrlResolver.GetUrlFromRoute(ContentReference contentReference, String language, RouteValueDictionary routeValues, RequestContext requestContext)
at EPiServer.Web.Routing.DefaultUrlResolver.GetVirtualPathInternal(ContentReference contentLink, String language, VirtualPathArguments arguments)
at EPiServer.Web.Routing.UrlResolver.GetUrl(ContentReference contentLink, String language)
at EPiServer.Find.Commerce.CommerceUnifiedSearchSetUp.GetContentUrl(ContentReference contentLink)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at EPiServer.Find.UnifiedSearch.IndexProjection.GetUrl(Object o)
at EPiServer.Find.DelegateValueProvider`2.GetValue(Object target)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at EPiServer.Find.Api.BulkActionConverter.WriteJson(JsonWriter writer, Object value, JsonSerializer serializer)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable(JsonWriter writer, JsonConverter converter, Object value, JsonContract contract, JsonContainerContract collectionContract, JsonProperty containerProperty)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
at EPiServer.Find.Json.Serializer.SerializeToTextWriter(JsonSerializer serializer, Object value, TextWriter textWriter)
at EPiServer.Find.Json.Serializer.SerializeObjectsToJsonRequest(JsonSerializer serializer, IJsonRequest jsonRequest, IEnumerable values)
at EPiServer.Find.Api.BulkCommand.Execute()
at EPiServer.Find.Cms.ContentIndexer.IndexWithRetry(IContent[] contents, Int32 maxRetries)
at EPiServer.Find.Cms.ContentIndexer.Index(IEnumerable`1 content, IndexOptions options)
at EPiServer.Find.Cms.ContentIndexer.IndexBatch(IEnumerable`1 content, Action`1 statusAction, Int32& numberOfContentErrors, Int32& indexingCount)