Overview

There is an issue where accessing the Content Library in the Persona Bar or deploying a visualizer on a page causes the site to slow down.

Prerequisites

• Must have a version lower than Evoq 9.4.0.

Diagnosis

There is a known bug within the code of the Evoq 9.1.1 version. This issue occurs when a specific Content type has a large number of fields and the API call to render the visualizer times out.

Error: FriendlyMessage="Error: Visualizer is currently unavailable."

Stack Trace:

DotNetNuke.Services.Exceptions.Exceptions - FriendlyMessage="Error: Visualizer is currently unavailable." ctrl="ASP.desktopmodules_dnncorp_structuredcontentvisualizer_view_ascx" exc="System.AggregateException: One or more errors occurred. ---> System.Threading.Tasks.TaskCanceledException: A task was canceled.
 --- End of inner exception stack trace ---
 at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
 at Evoq.StructuredContent.Visualizer.Components.Remote.VisualizerRemoteManager.CallRenderApi[T](Int32 portalId, String url)
 at Evoq.StructuredContent.Visualizer.Components.Remote.VisualizerRemoteManager.Render(String visualizerInstanceId, String currentPageUrl, Int32 portalId)
 at Polly.Policy.<>c__DisplayClass8_0`1.<Execute>b__0()
 at Polly.Retry.RetryEngine.Implementation(Action action, IEnumerable`1 shouldRetryPredicates, Func`1 policyStateFactory)
 at Polly.Policy.Execute[TResult](Func`1 action, Context context)
 at Evoq.StructuredContent.Visualizer.Components.Remote.VisualizerRetryRemoteManager.Render(String visualizerInstanceId, String currentPageUrl, Int32 portalId)
 at Evoq.StructuredContent.Visualizer.Components.VisualizerManager.<>c__DisplayClass7_0.<Render>b__0()
 at Evoq.StructuredContent.Visualizer.Components.VisualizerManager.ExecuteAndHandleExceptions(RenderResultMetadata renderResultMetadata, Int32 moduleId, Int32 portalId, Int32 version, Func`1 action)
 at Evoq.StructuredContent.Visualizer.Components.VisualizerManager.Render(ModuleInfo moduleInfo, Int32 version, Settings settings, String currentPageUrl)
 at Evoq.StructuredContent.Visualizer.View.InitializeRender()
---> (Inner Exception #0) System.Threading.Tasks.TaskCanceledException: A task was canceled.<---

Solution

The solution is to upgrade your environment to Evoq 9.4.

• You can download the upgrade packages and view the steps to upgrade your environment. 

After upgrading the environment to 9.4, run the following query:

In the above query,  '120' is the setting value, 0 means it is not a secure setting, and 1 is the User ID adding this setting.

• This will increase the visualizer render timeout value to 120 seconds.

Testing

To confirm the resolution of this issue, you should be able to access the Content Library.