How to fix the Oracle error ORA-12535: TNS:operation timed out?

In this post, you’ll learn more about the Oracle ErrorORA-12535: TNS:operation timed out with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12535: TNS:operation timed out

Reason for the Error ORA-12535: TNS:operation timed out

The requested operation could not be completed within the time out period.

How to fix the Error ORA-12535: TNS:operation timed out ?

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

Look at the documentation on the secondary errors for possible remedy. See SQLNET.LOG to find secondary error if not provided explicitly. Turn on tracing to gather more information.