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ORA-600 [kdourp_inorder] and ORA-600 [kcbzpbuf_1] and Instance Failure. (Doc ID 1066772.1)

Last updated on JANUARY 29, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.2]
Information in this document applies to any platform.


This problem was observed on Oracle 64-bit on a HP-UX PA-Risc 64bit server, using ASM

Problem description
Internal errors showing in the alert log, followed by instance termination.

The alert log shows these types of errors:
Errors in file <diagnostic_dest>/<dbname>/udump/<SID>_ora_17239.trc:
ORA-00600: internal error code, arguments: [kdourp_inorder1], [4], [211], [233], [44], [35], [0], []
Doing block recovery for file 206 block 1122542
. . . .
Hex dump of (file 2, block 46006) in trace file <diagnostic_dest>/<dbname>/bdump/<SID>_dbw2_7755.trc
Corrupt block relative dba: 0x0080b3b6 (file 2, block 46006)
Bad header found during preparing block for write
Data in bad block:
type: 167 format: 3 rdba: 0x0003ffbf
last change scn: 0x0003.a77d9080 seq: 0xff flg: 0xbf
spare1: 0x38 spare2: 0x80 spare3: 0xb800
consistency value in tail: 0x92d302dc
check value in block header: 0xa77d
computed block checksum: 0xa922
. . . . . .  .
Errors in file <diagnostic_dest>/<dbname>/bdump/<SID>_dbw2_7755.trc:
ORA-00600: internal error code, arguments: [kcbzpbuf_1], [4], [1], [], [], [], [], []
. . . . . .  . . . .
DBW2: terminating instance due to error 471
Instance terminated by DBW2, pid = 7755

Dbverify on the datafile will show to be clean, so this is an in-memory corruption.

The trace file will show a failing DML statement, for example, an update statement.
UPDATE <Table_name> SET ............

The function stack shows the problem occurring on an update, and writing a log entry.
   ksedst <- ksedmp <- ksfdmp <- kgerinv <- kgeasnmierr
   kdourp2 kdoura kco_issue_callback kcoapl kcbchg1_main
   kcbchg1 <- ktuchg <- ktbchg2 <- kdu_array_flush <- 424
   kdusru <- kauupd <- updrow

In the trace file, undo records will be dumped and you may see messages similar to the following

Block after image is corrupt:
buffer tsn: 3 rdba: 0x019120ee (6/1122542)
scn: 0x00b3.cf5f2e22 seq: 0x00 flg: 0x08 tail: 0x0003ffbf
frmt: 0x02 chkval: 0x0000 type: 0x06=trans data
Hex dump of corrupt header 2 = BROKEN

Other symptoms or conditions
   The Compatibility parameter in the database is set to 10.2....
   The database is using AUM (undo_management=auto)




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