Instance Crashing With ORA-600   in Different Processes
(Doc ID 1599526.1)
Last updated on JUNE 06, 2019
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 and later
Information in this document applies to any platform.
Instance crashed with internal error:
ORA-600  
signaled in DBWR process.
The stack trace includes:
... ksaamb ksasnd ksbasend kcbbdrv ksbabs ksbrdp ...
After applying Patch 12899768 the error was raised again in a different foreground process with messages:
KSAAMB: fatal error out of msg blks after 60 sec timeout
23 DBRM 'do RM action in DBRM'
24 DBRM 'shutdown DBRM'
25 DBRM 'DBRM Timeout Actions'
26 DBRM 'RM running count check'
27 DBRM 'Check for MDBRM to LDBRM message'
28 DBRM 'Check for LDBRM to MDBRM message'
29 DBRM 'DBRM Active Session Limit Event' <<<<<<<
30 DBRM 'Check queuing policy'
in trace file.
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