How to fix the Oracle error TNS-12539: TNS:buffer over- or under-flow?

In this post, you’ll learn more about the Oracle ErrorTNS-12539: TNS:buffer over- or under-flow with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12539: TNS:buffer over- or under-flow

Reason for the Error TNS-12539: TNS:buffer over- or under-flow

Cause: Buffer too small for incoming data or too large for outgoing data.

How to fix the Error TNS-12539: TNS:buffer over- or under-flow ?

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

Action: This restriction (which is associated with CONNECT DATA) is not normally visible to the user. For further details, turn on tracing and reexecute the operation; contact Oracle Customer Support.