New or Existing Connections Intermittently Fail on AIX using Port 1521. Error: ntresnt[1]=73

(Doc ID 2148740.1)

Last updated on NOVEMBER 29, 2017

Applies to:

Oracle Net Services - Version to [Release 11.2 to 12.1]
IBM AIX on POWER Systems (64-bit)


Connections using port 1521 are failing intermittently.

Connections on ports other than 1521 are working normally.

Oracle Net traces of the client and the corresponding listener show a reset handed up from underlying: ntresnt[1]=73. This occurs on both sides simultaneously.

ntresnt[1]=73 = Connection Reset by Peer


Client Trace



May have recently upgraded to Oracle 12


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms