We will be able to add 12.2 database in 12.1.0.4 and also test connection will work fine in moitoring configuration page.
But in the target page it will be shown as down with the below error
ORA-28040: No matching authentication protocol
The same occurs for ASM and cluster targets too.
This is because 12.1.0.4 OMS is certified to monitor only DB versions below 12.1.0.2.
Solution:
1. For monitoring 12.2 DB and related targets, OMS needs to be at least of 12.1.0.5 release with 12.1.0.8 DB plugin.
2. If this issue occurs in 12.1.0.5 release too, ensure that the latest DB and Agent bundle patches are applied at the Agent.
But in the target page it will be shown as down with the below error
ORA-28040: No matching authentication protocol
The same occurs for ASM and cluster targets too.
This is because 12.1.0.4 OMS is certified to monitor only DB versions below 12.1.0.2.
Solution:
1. For monitoring 12.2 DB and related targets, OMS needs to be at least of 12.1.0.5 release with 12.1.0.8 DB plugin.
2. If this issue occurs in 12.1.0.5 release too, ensure that the latest DB and Agent bundle patches are applied at the Agent.