Data Missing for devices after upgrade to DX Netops Performance Management 20.2.6 or later from a previous version
Errors seen in the Data Aggregator karaf.log that contain
"Message conversion error javax.jms.JMSException: Error converting message: ActiveMQObjectMessage"
A new field was added to the PollResponse message that is sent from the Data Collector (DC) to the Data Aggregator (DA) in DX Netops Performance Management 20.2.6 and later.
As the DA is expecting this new field, it cannot process the messages from the DC until the DC is upgraded as well.
Release : 20.2
Component : IM Reporting / Admin / Configuration
Make sure all data collectors are successfully upgraded as soon as possible after upgrading the DA to minimize this data gap
Note that the DA will be unable to process DC data collected between the time the DA is down for upgrade and the DC is upgraded.