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In SolarWinds NTA 4.0 – 4.1.2, Flow Storage may crash with this exception:
System.IO.IOException: The file exists.
ERROR SolarWinds.Orion.NetFlow.Service.Program - Unhandled exception: Message: The file exists.
This error is caused when either servers NTA application or Flow Storage Database (FSDB) have more than 65565 files in the C:\Windows\temp directory. The Windows operating system runs out of unused temporary file names and cannot create new temp files.
Stop Netflow or SolarWinds NetFlow Storage service.
C:\Windows\Tempin a file explorer window.