http://<DA>:8581/rest/emregistration points to an incorrect address for Event Manager
System was migrated from production environment and the event manager registration was not updated on the Data Aggregator
Release : 3.7 NetOps 20.2
Component : PERFORMANCE MANAGEMENT INTEGRATIONS
Confirm that the correct name or address is listed in the Event Manager data source, on Performance Center
If incorrect, change it to the correct name or address
Run the following from MySql on the Performance Center system
update em.data_sources set LastEvent=0,ConsumerID=0;
Then do an incremental sync of Event Manager