How to fix the Oracle error NNO-00058: cannot load topology data from configuration database?

In this post, you’ll learn more about the Oracle ErrorNNO-00058: cannot load topology data from configuration database with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNO-00058: cannot load topology data from configuration database

Reason for the Error NNO-00058: cannot load topology data from configuration database

Cause: An error was encountered while trying to load the server’s topology data from the configuration database. If more information is available, it will appear under this error. This error will cause the server to shut down.

How to fix the Error NNO-00058: cannot load topology data from configuration database ?

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

Action: Make sure that the database is running, that its name and password as specified in the Oracle Network Manager are accurate, and that there is SQL*Net connectivity between the Oracle Names server and the database. To force the server to start up anyway, using its checkpoint data, start the server with the names.no_region_database parameter set to TRUE. If no checkpoint data is available, the server will shut down.