ORA-28584: heterogeneous apply internal error
Cause: The apply slave process encountered an error while trying to apply changes through a gateway to a non-Oracle system
Action: Make sure that the apply database link is correctly configured and that the gateway listener and the non-Oracle system are correctly set up and are up and running. If everything is configured correctly and the problem still occurs, contact Oracle customer support. errors 28590 - 28599 are reserved for the HS agent control utility
https://support.oracle.com/
http://www.oracle.com/