How to fix the Oracle error NNC-00004: connection is broken?

In this post, you’ll learn more about the Oracle ErrorNNC-00004: connection is broken with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNC-00004: connection is broken

Reason for the Error NNC-00004: connection is broken

Cause: The connection from a name server or client program to another server has been broken, either because that server has shut down, or because the network path to the server has stopped working. This error is usually displayed underneath an error which describes the problem in more detail.

How to fix the Error NNC-00004: connection is broken ?

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

Action: Make sure that the server being connected to is running and listening on the address used, and that there is network connectivity between the two end-points.