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Home > Success Center > Network Performance Monitor (NPM) > Recommendation Service flapping between running and stopped

Recommendation Service flapping between running and stopped

Updated 10-09-2017

Overview

The Recommendation Service on the Orion Server is flapping between Running and Stopped. 

The logs for Recommendation Engine contain the following error:

2017-09-11 05:14:42,574 [SolarWindsRecommendations.OnStart] FATAL SolarWinds.Recommendations.Service.RecommendationsService - Unhandled exception caught.

System.TypeLoadException: Could not load type 'SolarWinds.Recommendations.Contract.WCFEndpoints.IDataProviderService' from assembly 'SolarWinds.Recommendations.Contract, Version=1.1.0.4358, Culture=neutral, PublicKeyToken=null'.

at SolarWinds.Recommendations.ServiceContainer.RecommendationsServicesHost..ctor()

   at SolarWinds.Recommendations.Service.RecommendationsService.DoStart()

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Threading.ThreadHelper.ThreadStart()  

Environment

  • NPM 12.1

Cause 

Unknown

Resolution

  1. From the Install or change a program Control Panel, repair Recommendation.

 

 

 

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Public