How to fix the Oracle error ORA-12556: TNS:no caller?

In this post, you’ll learn more about the Oracle ErrorORA-12556: TNS:no caller with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12556: TNS:no caller

Reason for the Error ORA-12556: TNS:no caller

TNS detected an incoming connect request but there was no caller.

How to fix the Error ORA-12556: TNS:no caller ?

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

Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.