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I am currently facing intermittent null reference error related to content testing pipeline. When I refresh the page Sitecore doesn't throw any error. After sometime when I click on any content item, I'm facing the below issue.

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Update 1 :- Stack trace

8596 06:14:53 ERROR Application error. Exception: System.Web.HttpUnhandledException Message: Exception of type 'System.Web.HttpUnhandledException' was thrown. Source: System.Web at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.sitecore_service_nolayout_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\81e6daec\c5a03d8d\App_Web_fbypcovb.3.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Nested Exception

Exception: System.NullReferenceException Message: Object reference not set to an instance of an object. Source: Sitecore.ContentTesting at Sitecore.ContentTesting.Pipelines.RenderLayout.EvaluateTestExposure.Process(RenderLayoutArgs args) at (Object , Object[] ) at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) at Sitecore.Layouts.PageContext.BuildControlTree(Object sender, EventArgs e) at System.Web.UI.Page.OnPreInit(EventArgs e) at System.Web.UI.Page.PerformPreInit() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

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    Include the stack trace as quoted text, please. For the search engines. In general though, "why isn't this working?" is very poor for this format.
    – Mark Cassidy
    Commented Oct 13, 2017 at 11:34
  • @MarkCassidy updated my question by providing logs from the sitecore. Commented Oct 16, 2017 at 6:12
  • It looks like you left a (rendering?) parameter somewhere empty... It's impossible to say without any detail about your setup.
    – DdW
    Commented Oct 17, 2017 at 13:57

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