ORA-00600 [ktcccod-1] Error From MMON Process Following Repeated EMNC Process Failures (Doc ID 1591783.1)

Last updated on JULY 22, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.6 to 12.1.0.1 [Release 11.1 to 12.1]
Information in this document applies to any platform.

Symptoms

The MMON background process reports an ORA-00600 [ktcccod-1] error periodically.  Prior to this error occurring, the alert log shows that the EMNC background process kept dying and failing to restart, e.g.: 


Wed Sep 25 09:19:48 2013
ERROR: Emon failed to start.
Starting background process EMNC
Wed Sep 25 09:19:48 2013
EMNC started with pid=48, OS id=27024
Wed Sep 25 09:21:08 2013
ERROR: Emon failed to start.
Starting background process EMNC
Errors in file /u01/app/oracle/diag/rdbms/bdsnadbq_xsq2/bdsnadbq2/trace/bdsnadbq2_mmon_23333.trc:
ORA-00443: background process "EMNC" did not start
Errors in file /u01/app/oracle/diag/rdbms/bdsnadbq_xsq2/bdsnadbq2/trace/bdsnadbq2_mmon_23333.trc  (incident=20663):
ORA-0060
0: internal error code, arguments: [ktcccod-1], [], [], [], [], [], [], [], [], [], [], []

 
Checking the MMON trace file will show the ORA-00600 [ktcccod-1] error occurring following MMON encountering an ORA-12751 error, e.g.: 

2013-09-25 09:19:08.896408 :AB03EEB4:db_trace:ksb.c@2350:ksbs1p_real(): [10254:28:46] KSBS1P: process MMON trying to start background EMNC
2013-09-25 09:19:08.896410 :AB03EEB5:db_trace:ksb.c@2413:ksbs1p_real(): [10254:28:46] KSBS1P: process MMON obtained PR enqueue to start background EMNC
2013-09-25 09:19:08.915085 :AB03EEDC:db_trace:ksb.c@2554:ksbs1p_real(): [10254:28:46] KSBS1P: spawn succeeded ospid = 26514
2013-09-25 09:19:08.915090 :AB03EEDE:db_trace:ksb.c@2612:ksbs1p_real(): [10254:28:46] KSBS1P: out of loop: process is up and running
2013-09-25 09:21:08.968368 :AB0582B5:db_trace:ksb.c@2350:ksbs1p_real(): [10254:28:46] KSBS1P: process MMON trying to start background EMNC
2013-09-25 09:21:08.968370 :AB0582B6:db_trace:ksb.c@2413:ksbs1p_real(): [10254:28:46] KSBS1P: process MMON obtained PR enqueue to start background EMNC
2013-09-25 09:21:08.968499 :AB0582BB:db_trace:ksb.c@2527:ksbs1p_real(): [10254:28:46] KSBS1P: interrupted with OER(12751)
2013-09-25 09:21:08.968503 :AB0582BD:db_trace:ksb.c@2617:ksbs1p_real(): [10254:28:46] KSBS1P: out of loop: process did not start
-------------------------------------------------------------------------------
Trace Bucket Dump End: default bucket for process 28 (osid: 23333, MMON)
ORA-00443: background process "EMNC" did not start
keltclnact: error 450 suppressed while clearing alert 147,1870658557,-1
Incident 20663 created, dump file: /u01/app/oracle/diag/rdbms/bdsnadbq_xsq2/bdsnadbq2/incident/incdir_20663/bdsnadbq2_mmon_23333_i20663.trc
ORA-00600: internal error code, arguments: [ktcccod-1], [], [], [], [], [], [], [], [], [], [], []

 
Checking the EMNC process will show the underlying error causing the problem, e.g.: 

error 43853 detected in background process
OPIRIP: Uncaught error 447. Error stack:
ORA-00447: fatal error in background process
ORA-43853: SECUREFILE lobs cannot be used in non-ASSM tablespace "SYSTEM"
ORA-06512: at "SYS.DBMS_AQADM_SYS", line 11626
ORA-06512: at line 1

 
NOTE:
The error ORA-00600 [ktcccod-1] can also be encountered due to an immediate shutdown being performed at the same time as the EMNC process starts.  For example:

Shutting down instance (immediate)
Shutting down instance: further logons disabled
...
Stopping background process MMON
...
ORA-00600: internal error code, arguments: [ktcccod-1], [], [], [], [], [], [], [], [], [], [], []

 

Cause

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