On OEM, when DBA trying to browse database performance or top activity page,
The following error occurs:
java.util.HashMap cannot be cast to oracle.sysman.emSDK.sec.targetauth.EMTargetConnectionPool
Checked named credential working fine against database target, and preferred credential has been setup against database target accordingly.
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In your environment, there are hundreds or even thousands of targets managed by OEM, and a doze or even hundreds of OEM administrators and users. In this case, effectively and securely managing Named Credentials ( NC ) is a challenging job. Usually, every OEM administrator or user creates and manages their own Named Credentials ( NC ). So many duplicate copies of Named Credentials ( NC ) are kept, it brings difficulties for updating them if any targets credentials changed.
This post demonstrates how to share a Named Credentials ( NC ) with many administrators and users in any size of OEM environment by using a role. Same as an Oracle database role, which can be granted to a role or a user.
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