Instance Crash While Using Dblink Ora-2068 ORA-07445 in RECO process (Doc ID 336208.1)

Last updated on MAY 12, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 to 10.2.0.2 [Release 9.2 to 10.2]
Information in this document applies to any platform.
***Checked for relevance on 29-Apr-2013***

Symptoms

On RAC instance, with db link, select query is failing with

ORA-07445: exception encountered: core dump [] [SIGSEGV] [unknown code] [0x000000060] [] []
ORA-02068: following severe error from MBODMRTT
ORA-03113: end-of-file on communication channel


The complete sequence of messages in the alert log is similar to:

Errors in file /apps01/app/oracle/admin/MBODODST/udump/mbods1_reco_28993.trc:
ORA-07445: exception encountered: core dump [] [SIGSEGV] [unknown code] [0x000000060] [] []
ORA-02068: following severe error from MBODMRTT
ORA-03113: end-of-file on communication channel
Mon Sep 26 02:23:58 2005
Trace dumping is performing id=[cdmp_20050926022358]
Mon Sep 26 02:23:59 2005
Errors in file /apps01/app/oracle/admin/MBODODST/bdump/mbods1_pmon_28971.trc:
ORA-00476: RECO process terminated with error
Mon Sep 26


Also, we might see the following errors in alert.log:

ORA-02068: following severe error from dblink_name
ORA-03113: end-of-file on communication channel
ORA-07445: exception encountered: core dump [lxsCpStr()+688] [SIGSEGV] [Address not mapped to object] [0x60] [] []

Cause

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