How to fix the Oracle error ORA-16644: apply instance not available?

In this post, you’ll learn more about the Oracle ErrorORA-16644: apply instance not available with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16644: apply instance not available

Reason for the Error ORA-16644: apply instance not available

The broker operation could not finish, because it requires a running apply instance for the standby database, and either there was no such instance designated for the standby database or the designated apply instance was not currently available.

How to fix the Error ORA-16644: apply instance not available ?

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

Start the designated apply instance or wait until the broker specifies an instance to be the apply instance and reissue the command.