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Home > Success Center > Network Performance Monitor (NPM) > Additional Polling Engine SWIS v.3 restarting

Additional Polling Engine SWIS v.3 restarting

Created by Elvin Perez, last modified by Melanie Boyd on Apr 19, 2017

Views: 3 Votes: 0 Revisions: 9

Updated February 5, 2017


NPM and NTA Additional Polling Engine upgrade issue.

SWIS version 3 keeps on restarting on the Additional Polling Engine.


Swis ver 3 logs:

016-06-13 02:31:16,056 [6] ERROR SolarWinds.InformationService.Core.EndpointInfo - (null)  Error initializing or starting an instance of provider [SolarWinds.InformationService.MetadataProvider.MetadataProvider, SolarWinds.InformationService.Core]
System.NullReferenceException: Object reference not set to an instance of an object.
   at SolarWinds.InformationService.MetadataProvider.MetadataProvider.<GetTypes>d__0.MoveNext()
   at SolarWinds.InformationService.MetadataProvider.MetadataProvider.GetRelationships(IEnumerable`1 relationships)
   at SolarWinds.InformationService.MetadataProvider.MetadataProvider.StartInternal()


2016-06-13 02:31:16,103 [6] ERROR SolarWinds.InformationService.Core.EndpointInfo - (null)     Error initializing or starting an instance of provider [SolarWinds.Data.Providers.Orion.Netflow.FastBit.FastBitDataProvider, SolarWinds.Data.Providers.Orion.Netflow.FastBit]
System.IO.FileNotFoundException: Could not load file or assembly 'SolarWinds.Netflow.FastBit.Contract, Version=, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'SolarWinds.Netflow.FastBit.Contract, Version=, Culture=neutral, PublicKeyToken=null'


2016-06-13 02:31:25,213 [6] ERROR SolarWinds.Data.Providers.Orion.Containers.LimitationSnapshotService.DAL.LimitationSnapshotDAL - (null)       Cannot delete orphaned limitation snapshots. System.NullReferenceException: Object reference not set to an instance of an object.
   at SolarWinds.Data.Query.Processor.StorageTranslator.TryMakeStorageExpression(EntityExpression conceptualEntityExpression, IMappingFragment mappingFragment, SwqlExpression& storageExpression)
   at SolarWinds.Data.Query.Processor.StorageTranslator.HandlePropertyFromEntityWithSinglePartitions(IEntityTypeMapping entityMapping, EntityExpression conceptualEntityExpression)
   at SolarWinds.Data.Query.Processor.StorageTranslator.HandleProperty(EntityExpression entityExpression)



All NPM versions

All NTA versions


Missing NTA schemas causing Swis v.3 to crash.


Collect diagnostics from the primary Orion server and the additional polling engine (Post failed upgrade investigation by Dev is necessary even if these steps are effective).

  1. On the additional polling engine, use the Service Manager to stop all Orion services. 

  2. Copy the following files (NTA schemas) from the primary Orion server to the same location on the additional polling engine: 
    C:\Program Files (x86)\SolarWinds\Orion\Information Service\3.0\Schemas\

  3. Restart all the Orion services on the additional polling engine.



Last modified
12:13, 19 Apr 2017



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