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Exadata: HOLD DISKMON KGZM_FENCE_ENTITY - ASM Unable To Access Cells Due To Cell Fencing (Doc ID 1610017.1)

Last updated on SEPTEMBER 24, 2021

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


Following error is seen on old installation DISKMON daemon:

ORA-00600: internal error code, arguments: [kszaddossdev8], [56840]


When trying to perform the downgrade from to (after a failed upgrade on the second node).

The following command run successfully on first node

[node1 ~]# /u01/app/ -downgrade -force -oldcrshome /u01/app/ -version
Successfully downgraded Oracle Clusterware stack on this node

First node has the old ocr backup:

[oracle@node1 cdata]$ ls -lart ocr*
-rw------- 1 root root 133692 Nov 23 14:41 ocr11.

The downgrade failed on the second node:

[node2 ~]# /u01/app/ -downgrade -force -lastnode -oldcrshome /u01/app/ -version
CRS-2672: Attempting to start 'ora.asm' on '<node2>'
CRS-5017: The resource action "ora.asm start" encountered the following error:
ORA-03113: end-of-file on communication channel
Process ID: 20430
Session ID: 66 Serial number: 1CRS-2674: Start of 'ora.asm' on '<node1>' failed
CRS-4000: Command Start failed, or completed with errors.
Failed to start the Clusterware stack from the lower version


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