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Updated January 30, 2017
This article provides brief information on the following error in the InformationServices.log and has been reported in tandem with repeated information services and Orion Module Engine crashes on the Additional Polling Engine:
2017-01-18 18:35:44,905  WARN SolarWinds.InformationService.Federation.RemoteSwisFacade - (null) (null) Unable to fetch system identifiers for RemoteInformationSwervice with instance site id : 1
System.ArgumentException: No proxy provider found for SWIS service at https://solarwinds:8124/iwc/services...rmationService
at SolarWinds.InformationService.Federation.RemoteSwisFacade.GetProxy(RemoteInformationService remoteSwis)
at SolarWinds.InformationService.Federation.RemoteSwisFacade.Query(RemoteInformationService remoteSwis, String queryString)
at SolarWinds.InformationService.Federation.RemoteSwisFacade.GetSystemIdentifiers(RemoteInformationService remoteSwis)
NPM version 12.0.1
Ensure bidirectional TCP port 8124 connectivity between the Additional Polling Engine and the Primary Polling Engine. Also ensure that the correct schema.xml and DLL (plugins) exist on both the Primary Polling Engine and Additional Polling Engine.