1.11.2010

Oracle Bugs - Part 2 (ASM instance on RAC crashed due to ORA-600 [kfclUpdateBuffers20])

Here comes the Part 2 story of my encounter with various Oracle bugs in the recent past.

An ASM instance on one of the node of 8 node RAC environment crashed due to 'ORA-00600: internal error code, arguments: [kfclUpdateBuffers20]' error and all the active instances on this node crashed too with 'communication failure with ASM instance'.

 The cause is due to an intermittent buffer conversion problem in ASM internal structures,  LMS b/g process has terminated the ASM instance with an ORA-600 kfclUpdateBuffers20 error.


Following bugs have been registered against this behavior:
Bug 6489250 INTERMITTENT ORA-600 [KFCLUPDATEBUFFERS20] WITH ASM
Bug:6605106 AN ASM NULL CONVERTED BUFFER MAY BE REFERENCED
 

Details:
ORA-600 [kfclUpdateBuffers20] can occur in ASM as a null converted
buffer may be accessed. Other errors could also occur.


To fix this bug, either apply one-off patch which suits your environment version or apply 10.2.0.5 or upgrade to 11g.

Happy oracle bugs reading.

Jaffar

1 comment:

odenysenko said...

Thanks for post.

The most interesting thing is WHY fix for this issue wasn't included at least in recent CRS PSU#2 or DB PSU#2 ?
especially in case if this issue may become the reason of instance crashes...

odenysenko