Oracle Net: Intermittent 3135/12592/3113 Errors Returned to Client Application

(Doc ID 2237258.1)

Last updated on NOVEMBER 15, 2017

Applies to:

Oracle Net Services - Version 11.2.0.1 to 12.1.0.2 [Release 11.2 to 12.1]
Information in this document applies to any platform.

The issue documented here is NOT related to this known issue:

Network related error like ORA-12592 or ORA-3137 or ORA-3106 may be signaled (Doc ID 18841764.8)
Bug 18841764

Symptoms

An OCI client of any kind, including SQL*Plus using a version 11gR2 Oracle client.   The application might be multi threaded. 

The application is failing with intermittent ORA-3135 errors.  A client trace can show either a 12569 or 12592 error that indicates a 'bad packet' message. 

All of the errors associated with this condition:

ns=12592    <Seen in Oracle net trace.  Bad packet
ORA-12592:  TNS:  Bad packet
ORA-3135:   TNS: Connection Lost Contact
ORA-03113:  End-of-file on communication channel
ORA-12152:  TNS:unable to send break message

Changes

This may be a new implementation or a change has occurred on this network.

Cause

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