How to fix the Oracle error ORA-16084: an apply engine is already running?

In this post, you’ll learn more about the Oracle ErrorORA-16084: an apply engine is already running with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16084: an apply engine is already running

Reason for the Error ORA-16084: an apply engine is already running

A logical standby apply engine was running when another was created.

How to fix the Error ORA-16084: an apply engine is already running ?

You can fix this error in Oracle by following the below steps

Shut down the previous apply engine before starting a new one.