How to fix the Oracle error ORA-16858: last communication time from redo source could not be determined?

In this post, you’ll learn more about the Oracle ErrorORA-16858: last communication time from redo source could not be determined with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16858: last communication time from redo source could not be determined

Reason for the Error ORA-16858: last communication time from redo source could not be determined

The standby database had never been contacted by the redo source.

How to fix the Error ORA-16858: last communication time from redo source could not be determined ?

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

Ensure that there is network connectivity between the redo source and standby databases, and the redo source is working properly.