Network Management

Cannot delete unmanaged nodes

This article shows how to resolve an issue with Nodes that cannot be deleted after Unmanaging it from the Manage Nodes page of the SolarWinds Platform Web Console.

First published date

10/15/2018 2:24 PM

Last published date

6/25/2025 5:34 PM

Overview

This article shows how to resolve issues with nodes that cannot be deleted after Unmanaging them because of polling issues. The node in question may be able to be searched in Search Node Resource but not on the Manage Nodes page. There may also be an error displayed "Rediscover failed" when attempting to Rediscover after Re-managing the Node. The following error may also be seen in C:\Programdata\SolarWinds\Logs\Orion\OrionWeb.log:
 

ERROR SolarWinds.Orion.Core.Common.CoreBusinessLayerProxy - Can not get host from the database
ERROR SolarWinds.Orion.Core.Common.CoreBusinessLayerProxy - Can not get port from the database
RROR NodeManagement - Error in Rediscover function.
System.ArgumentException: host is empty
Parameter name: host
at SolarWinds.Orion.Core.Common.CoreBusinessLayerProxy..ctor(String host, String port, Binding binding, HandleBusinessLayerException exceptionDelegate)

Product section

Network Performance Monitor

Resolution

  1. Go to Node Details page and click on Edit Node. Check whether the node is assigned to a polling engine.
  2. Connect to the SolarWinds Server.
  3. Launch Database Manager from the SolarWinds Platform folder of the start menu and click Add Orion Database.
  4. Expand the SQL Server and Database in bold.
  5. Double-click the Engines table and execute the query on the right to view the table
  6. Compare the EngineID of the node with the EngineID in the Engines table.
  7. Modify the EngineID of the node to match the EngineID of the SolarWinds Platform Server.
  8. Go back to the SolarWinds Platform Web Console and click Rediscover.

Please see Unmanaged VM nodes can be searched for but can not be deleted for information on a similar issue with Virtual Machines being searchable but not displaying in the Manage Nodes page.