Tag Archives: Exadata Critical Issue DB27

Exadata Critical Issue DB27

Oracle announced a new Exadata Critical Issue yesterday (DB27) as per MOS 2004572.1. databases running with Grid Infrastructure 12.1 (either or will crash whenever a health update is received (such as when a cell disk is marked “predictive failure”).

The database ASMB process terminates causing the database instance to crash.  The following errors are reported in the database alert.log:

ORA-15064: communication failure with ASM instance
ORA-03115: unsupported network datatype or representation
ASMB: terminating the instance due to error 15064

Perform one of the following actions to prevent bug 20361671:

  1. Upgrade the Grid Infrastructure home to (Database Patch for Engineered Systems and DB In-Memory or later.
  2. Apply patch 20361671 to the Grid Infrastructure home.

At the time of writing, the patch README incorrectly omits the rootcrs.pl commands required to unlock and lock the Grid Infrastructure home before and after patching, respectively.

Prior to running the opatch command to apply the patch run the following rootcrs.pl command as the root user to unlock the Grid Infrastructure home:

$GI_HOME/crs/install/rootcrs.pl -unlock

After applying the patch run the following rootcrs.pl command as the root user to lock the Grid Infrastructure home:

$GI_HOME/crs/install/rootcrs.pl -patch

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