ORA-600:[kcbzwfcro_2] Reported in Alert.log (Doc ID 2085507.1)

Last updated on DECEMBER 22, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

Alert log reports errs like:

Errors in file /u01/app/oracle/diag/rdbms/piaprod/piaprod2/trace/piaprod2_p029_2980.trc:
ORA-10388: parallel query server interrupt (failure)
ORA-00600: internal error code, arguments: [kcbzwfcro_2], [187984], [1], [32768], [0], [], [], [], [], [], [], []
Errors in file /u01/app/oracle/diag/rdbms/piaprod/piaprod2/trace/piaprod2_p029_2980.trc:
ORA-10388: parallel query server interrupt (failure)
ORA-00600: internal error code, arguments: [kcbzwfcro_2], [187984], [1], [32768], [0], [], [], [], [], [], [], []


The trace file contains no current sql and a call stack with functions like:

... ksucin krr_thread_read krr_read_buffer krr_parse_redo kcra_scan_redo kcra_dump_redo kcra_dump_redo_internal kcbzwfcro kcbgcur ktbgcur
kturGetCurPinForUndo kdiulk kcoubk ktprundo_intra ktprits ktprmai kxfprdp opirip opidrv sou2o opimai_real ssthrdmain main


At the beginning of the trace file also lines are reported like:

========= Dump for incident 231769 (ORA 600 [kcbzwfcro_2]) ========
----- Beginning of Customized Incident Dump(s) -----
Potentially stale force-CR-override buffer found before OBJD MISMATCH check.
This issue should be investigated by both cache fusion and space layer.
BH (0x57f89cc98) file#: 7 rdba: 0x0006048b (1024/394379) class: 1 ba: 0x57c3ea000
set: 48 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0,5
dbwrid: 1 obj: 187984 objn: 187984 tsn: 7 afn: 7 hint: f
hash: [0xc12258060,0x2e7778a30] lru: [0x8f79d14a8,0x6f787e608]
ckptq: [NULL] fileq: [NULL] objq: [0x6af974790,0x3e7a932f0] objaq: [0x9ef72d000,0x977872820]
st: XCURRENT md: NULL fpin: 'kdgwh05: kdglfe' tch: 4 le: 0x7b7e39ef0
flags: block_written_once redo_since_read remote_transfered
force_cr_override
...

 

Cause

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