topology_agent not found messages in hub.log

Document ID : KB000100711
Last Modified Date : 08/06/2018
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Issue:
UIM: The hub.log shows the following error twice a minute for Hubs even though they are not configured with "Topology and Root Cause Analysis"  and "Relationship Viewer" features.

Example of error:
name to IP failed for /UIMDomainName/HubName/HubRobotName/topology_agent (not found) 
sent error message response
Environment:
Any UIM version
Cause:
By default the Hub will check for the topology_agent anytime the discovery_agent is present even in scenarios where "Topology and Root Cause Analysis"  and "Relationship Viewer" features is not enabled
Resolution:
The following two options are available:

1. Ignore the error as it is benign
2. Install the topology_agent