Grid Infrastructure May Reboot Nodes If Information Must Be Printed To The Serial Console
(Doc ID 2295141.1)
Last updated on JULY 09, 2023
Applies to:
Oracle Database Appliance - Version All Versions to All Versions [Release All Releases]Information in this document applies to any platform.
Symptoms
The system reboot suddenly. Sometime from lastgasp we can find it is css or cssmoniter rebooted the node because lost interconnection:
Network communication with node hpnplppmdb12 (2) missing for 90% of timeout interval. Removal of this node from cluster in 2.320 seconds
Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread_0 not scheduled for 21140 msecs.
In kdump-dmessage or os message file file we can find:
In OSW -- general CPU usage is low but some time we can find system CPU spike.
Changes
sysctl -a|grep printk
kernel.printk = 3 4 1 7
and iptables enabled.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |