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I faced with that issue on while I recreated repo on 11.2.0.4 RAC system.

My step is:

[oracle@node1~]$ emca -config dbcontrol db -repos create -cluster <<<<< Enter the related information

After related steps done the login to the database Console works fine. The Target is shown as UP but the ‘host cpu’ section in the shows:

The host cpu chart could not be generated.
1. Error: Invalid BoundDataSource: no class, method or dataSource provided.
2. check the log file for details

– The ‘Active Sessions’ section shows

The Active Sessions chart could not be generated.
1. Error: Invalid BoundDataSource: no class, method or dataSource provided.
2. check the log file for details

Even I try drop and recreate repos but still hitting same issue
emca -deconfig dbcontrol db -repos create -cluster  <<< for drop
emca -deconfig dbcontrol db -repos drop -cluster    <<< for recreate
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