How to fix the Oracle error ORA-24301: null host specified in thread-safe logon?

In this post, you’ll learn more about the Oracle ErrorORA-24301: null host specified in thread-safe logon with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-24301: null host specified in thread-safe logon

Reason for the Error ORA-24301: null host specified in thread-safe logon

An HDA was not specified in the logon call while running in a thread safe environment.

How to fix the Error ORA-24301: null host specified in thread-safe logon ?

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

Make sure that HDA is not NULL when calling the logon routine.