A route named 'DefaultApi' is already in the route collection. Route names must be unique.

Problem:

A route named 'DefaultApi' is already in the route collection. Route names must be unique.
Parameter name: name

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: A route named 'DefaultApi' is already in the route collection. Route names must be unique.
Parameter name: name

Source Error:

Line 24: public static void Register(HttpConfiguration config) Line 25: { Line 26: config.Routes.MapHttpRoute( Line 27: name: "DefaultApi", Line 28: routeTemplate: "api/{controller}/{action}/{id}",

Source File: D:\Source\be\src\Foundation\Api\code\App_Start\WebApiConfig.cs    Line: 26

Stack Trace:

[ArgumentException: A route named 'DefaultApi' is already in the route collection. Route names must be unique. Parameter name: name] System.Web.Routing.RouteCollection.Add(String name, RouteBase item) +391 System.Web.Http.HttpRouteCollectionExtensions.MapHttpRoute(HttpRouteCollection routes, String name, String routeTemplate, Object defaults) +21 Infocentric.Sc.Foundation.Api.WebApiConfig.Register(HttpConfiguration config) in WebApiConfig.cs:26 Infocentric.Sc.Foundation.Api.WebApiConfig.Start() in WebApiConfig.cs:19 [TargetInvocationException: Exception has been thrown by the target of an invocation.] System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0 System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +260 System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +142 WebActivatorEx.BaseActivationMethodAttribute.InvokeMethod() +81 WebActivatorEx.ActivationManager.RunActivationMethods(Boolean designerMode) +699 WebActivatorEx.StartMethodCallingModule.Init(HttpApplication context) +122 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +581 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +168 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +277 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +369 [HttpException (0x80004005): Exception has been thrown by the target of an invocation.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +111 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +714

Solution:

I renamed the namespaces without removing associated bin and output files. Manually delete the bin and obj folders from the output directory. Rebuild or cleaning the solution is not enough.

Sitecore Method not found: 'Void SolrNet.Impl.SolrMoreLikeThis

Problem:

Method not found: 'Void SolrNet.Impl.SolrMoreLikeThisHandlerQueryResultsParser`1..ctor(System.Collections.Generic.IEnumerable`1<SolrNet.Impl.ISolrAbstractResponseParser`1<System.__Canon>>)'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.MissingMethodException: Method not found: 'Void SolrNet.Impl.SolrMoreLikeThisHandlerQueryResultsParser`1..ctor(System.Collections.Generic.IEnumerable`1<SolrNet.Impl.ISolrAbstractResponseParser`1<System.__Canon>>)'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[MissingMethodException: Method not found: 'Void SolrNet.Impl.SolrMoreLikeThisHandlerQueryResultsParser`1..ctor(System.Collections.Generic.IEnumerable`1 Sitecore.ContentSearch.SolrProvider.SolrNetIntegration.DefaultSolrLocator`1..ctor() +0 Sitecore.ContentSearch.SolrProvider.Pipelines.Loader.InitializeSolrProvider.Process(PipelineArgs args) +209 (Object , Object ) +9 Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +484 Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain, Boolean failIfNotExists) +236 Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain) +22 Sitecore.Nexus.Web.HttpModule.Application_Start() +215 Sitecore.Nexus.Web.HttpModule.Init(HttpApplication app) +1184 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +581 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +168 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +277 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +369 System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +111 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +714

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Solution:

- I found a SolrNet.xml in Website/bin whitch had those bad refererences. Well there was is hardcoded SolrNet.dll. I removed that an pulled the lastest Version of Solr via nuget. Than it worked fine.