ORA-00600 [ktecgsc:kcbz_objdchk] on 11.2

Last updated on MARCH 24, 2016

Applies to:

Symptoms

1. The following error is raised by a W### process:
   
   *** 2013-05-23 12:20:02.137
   *** SESSION ID:(426.38291) 2013-05-23 12:20:02.137
   *** CLIENT ID:() 2013-05-23 12:20:02.137
   *** SERVICE NAME:(SYS$BACKGROUND) 2013-05-23 12:20:02.137
   *** MODULE NAME:(KTSJ) 2013-05-23 12:20:02.137
   *** ACTION NAME:(KTSJ Slave) 2013-05-23 12:20:02.137
   
   Dump continued from file: /paic/sx/ics/data/app/oracle/diag/rdbms/ics/ics/trace/ics_w006_25483.trc
   ORA-00600: internal error code, arguments: [ktecgsc:kcbz_objdchk], [0], [0], [1], [], [], [], [], [], [], [], []
   
   ========= Dump for incident 104147 (ORA 600 [ktecgsc:kcbz_objdchk]) ========
   ----- Beginning of Customized Incident Dump(s) -----
   Input data 0x0, 0, 0
   Formatted dump of block:
   buffer tsn: 4 rdba: 0x01002e4a (4/11850)
   scn: 0x082a.f00dd046 seq: 0x01 flg: 0x04 tail: 0xd0462301
   frmt: 0x02 chkval: 0xcea6 type: 0x23=PAGETABLE SEGMENT HEADER
   Hex dump of block: st=0, typ_found=1
   
   
   
2. Review of the generated tracefiles reveals a call stack similar to:
   
   ... <- _$c1A.kcbz_check_objd_typ <- kcbzib <- kcbgcur <- ktecgsc <- ktecgetsh <- ktecgshx <- ktssupd_segment_extblks_bkg <- ktsj_execute_task <- ktsj_slave_main <- ksvrdp <- opirip <- ...

Cause