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Home > Success Center > Netflow Traffic Analyzer (NTA) > NTA - Knowledgebase Articles > The Netflow Collector is down even though NTA and Flow Storage Database services are up

The Netflow Collector is down even though NTA and Flow Storage Database services are up

Updated January 11, 2017


This article describes how to resolve issues when the NetFlow Collector is down but NTA and Flow Storage Database (FSDB) services are up.

The NTA Business Layer log contains the following error:

2018-01-09 10:18:36,459 [8] FATAL SolarWinds.Netflow.Processing.AppContext - FastBit Server version '4230' doesn't match with expected server version '4210' for this client. Please upgrade FastBit server to required version.
2018-01-09 10:18:36,459 [8] INFO  SolarWinds.Netflow.FastBit.Contract.FastBitClientConfig - Loading FastBit Client configuration...


Version of NTA installed on the Primary Polling Engine is not identical with the FSDB service installed on the Flow Storage Database Server.


This article applies NTA 4.2 and earlier. NTA 4.4 and later versions use a SQL Server database to store flow data. For more information, see Databases used by SolarWinds modules.


  • NTA 4.2 and earlier


  1. Identify the versions of both NTA modules installed on the Orion server and the Flow Storage Database
  2. Check the compatibility of the NTA modules with the Orion version
  3. Upgrade or downgrade the NTA Flow Storage Database 



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