KVM-clock switch triggers ORA-600 during autoscaling task in Exadata

Applies to:

Linux OS - Version Oracle Linux 6.10 and later

Linux x86-64

Symptoms

After CPUs being hot-added, Oracle Database processes may show ORA-600 errors, similar to the ones below.

ORA-00600: internal error code, arguments: [ossdisk_exceeded_lease_time],
[2946044663766], [2946044663041], [], [], [], [], [], [], [], [], []
2023-03-07T13:46:49.237829-06:00
ERROR: unrecoverable error ORA-600 raised in ASM I/O path; terminating
process 228282
Process termination requested for pid 228282 [source = rdbms], [info = 2]
[request issued by pid: 228282, uid: 1001]
2023-03-07T13:46:49.414461-06:00
Dumping diagnostic data in directory=[cdmp_20230307134649], requested by
(instance=3, osid=228282 (PR00)), summary=[incident=287401].
2023-03-07T13:46:52.536937-06:00

Changes

Autoscaling CPUs for KVM instances.

Cause

Guest clock source switched from tsc to kvm-clock during hot-add CPUs.