USM error : Network Adapter could not establish the connection

Document ID : KB000115419
Last Modified Date : 20/09/2018
Show Technical Document Details
Issue:
An error come up when try to drill down a metric in USM.

An Unknown error has occurred.
Refreshing your browser may resolve the issue.

Details: 
com.firehunter.ump.exceptions.DataFactoryException : 
The Network Adapter could not establish the connection
Please check the log for more information.
Environment:
UIM 8.5.1
UIM database instance running in Oracle RAC.
Cause:
Performance slowness identified in UIM database instance running in Oracle RAC.
It caused the error in USM.
Resolution:
The error in USM was resolved after stopping one of problematic cluster member from the RAC configuration.