CMAN 11gR2: Clients Fail with ORA-12637: Packet Receive Failed (Doc ID 1449046.1)

Last updated on SEPTEMBER 06, 2017

Applies to:

Oracle Net Services - Version 11.2.0.2 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.
This document applies only to installations using CMAN versions higher than 11.2.0.1.
Checked for relevance on 2-MAY-2017

Symptoms

When using Connection Manager Version 11.2.0.2 or higher, clients intermittently encounter the following error:


ORA-12637: Packet receive failed  The following error might also be present in the trace:  ns2=12532


From the Oracle Net client trace file, we see that the client receives an exit packet:


(770311936) [15-MAR-2012 09:16:10:686] nsprecv: 10 bytes from transport
(770311936) [15-MAR-2012 09:16:10:686] nsprecv: tlen=10, plen=10, type=6
(770311936) [15-MAR-2012 09:16:10:686] nsprecv: packet dump
(770311936) [15-MAR-2012 09:16:10:686] nsprecv: 00 0A 00 00 06 00 00 00 |........|
(770311936) [15-MAR-2012 09:16:10:686] nsprecv: 00 40 |.@ |

After which the error appears:

(770311936) [15-MAR-2012 09:16:10:687] nserror: nsres: id=0, op=68, ns=12537, ns2=12532; nt[0]=0, nt[1]=0, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
(770311936) [15-MAR-2012 09:16:10:687] nacomrc: received 12637 bytes
(770311936) [15-MAR-2012 09:16:10:687] nacomrc: failed with error 12637
(770311936) [15-MAR-2012 09:16:10:687] nacomrc: exit
(770311936) [15-MAR-2012 09:16:10:687] na_receive_packet: failed with error 12637
(770311936) [15-MAR-2012 09:16:10:687] na_receive_packet: exit
(770311936) [15-MAR-2012 09:16:10:687] na_client: failed with error 12637



Connections via CMAN 11gR2 to 10g instances in the same environment may not exhibit this problem.

Cause

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