DBWR Hits ORA-600 [H_MK_WRITING_CR_BG] (Doc ID 1946758.1)

Last updated on JULY 19, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2.0 and later
Information in this document applies to any platform.

Symptoms

DBWR signals ORA-600 [H_MK_WRITING_CR_BG] and fails, crashing the instance.

 

The trace file written by DBWR will have the error and a buffer dump near the top:

 

ORA-00600: internal error code, arguments: [H_MK_WRITING_CR_BG], [], [], [], [], [], [], [], [], [], [], []

========= Dump for incident 141278 (ORA 600 [H_MK_WRITING_CR_BG]) ========
----- Beginning of Customized Incident Dump(s) -----
BH (0x15aff1c30) file#: 1 rdba: 0x00401551 (1/5457) class: 1 ba: 0x15ae8c000
 set: 68 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0,0
 dbwrid: 3 obj: 37 objn: -1 tsn: 0 afn: 1 hint: f
 hash: [0x21d5febc0,0x15aff5b10] lru: [0x15cfeb6c0,0x15bff1708]
 ckptq: [NULL] fileq: [NULL] objq: [0x15aff5558,0x21cf6cd08] objaq: [0x15bfef790,0x15aff5568]
 use: [0x21d63bb20,0x21d63bb20] wait: [NULL]
 st: MEDIA_WRITING md: SHR rsop: 0x21cf5b1b0 fpin: 'qeilwhnp: qeilbk' tch: 7 rlscn: 0x0000.ec663be4
 flags: block_written_once
Dump of buffer cache at level 10 for tsn=0 rdba=4199761
BH (0x15aff5a58) file#: 1 rdba: 0x00401551 (1/5457) class: 1 ba: 0x15aef2000
 set: 68 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0,0
 dbwrid: 3 obj: 37 objn: -1 tsn: 0 afn: 1 hint: f
 hash: [0x15aff1ce8,0x21d5febc0] lru: [0x15aff47c8,0x15bff0e80]
 obj-flags: object_ckpt_list
 ckptq: [0x155fc2ea8,0x155fc5818] fileq: [0x157fbcc00,0x155fc2eb8] objq: [0x21cf6cd18,0x21cf6cd18] objaq: [0x15aff5568,0x21cf6ccf8]
 st: MEDIA_RCV md: NULL rsop: 0x21cf5b1b0 tch: 1 rlscn: 0x0000.ec6671ad
 flags: buffer_dirty block_written_once recovery_in_flux
 buffer tsn: 0 rdba: 0x00401551 (1/5457)
 scn: 0x0000.ec6671d3 seq: 0x01 flg: 0x04 tail: 0x71d30601
 frmt: 0x02 chkval: 0xfe31 type: 0x06=trans data
Hex dump of block: st=0, typ_found=1

 

The Call stack in the incident trace file written by the error will include the following functions:

 

kcbbic2 <- kcbbic1 <- kcbbiop <- kcbbdrv <- ksbabs <- ksbrdp <- opirip <- opidrv <- sou2o

  

 

Cause

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