Linux kernel faulty on unmap_single on Exadata compute nodes
(Doc ID 1514687.1)
Last updated on APRIL 12, 2022
Applies to:
Oracle Exadata Hardware - Version 11.2.0.2 to 11.2.0.3 [Release 11.2]Exadata Database Machine X2-2 Full Rack - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine X2-2 Half Rack - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine X2-2 Qtr Rack - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine V2 - Version All Versions to All Versions [Release All Releases]
x86 64 bit
Symptoms
- One of compute nodes was rebooted.
- No error message in GI alert log, ocssd log, css agent log, css monitor agent log, diskmon log.
- No error message in OS log.
- OS watcher doens't show any resource problem before the node got rebooted.
- As per ocssd logs from other nodes, both network heartbeat and disk heartbeat were lost at the time that OSW logging stopped.
- ILOM snapshot captured console output before last reboot as follows:
Cause
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