Oracle ZFS Storage Appliance: The system has rebooted after a kernel panic

Asset ID:	1-72-1900847.1
Update Date:	2018-04-06
Keywords:

Solution Type Problem Resolution Sure

Solution 1900847.1 : Oracle ZFS Storage Appliance: The system has rebooted after a kernel panic

Applies to:

Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-4 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-2 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Symptoms

For the Oracle ZFS Storage Appliance an ASR may be generated indicating that system was rebooted after kernel panic.

Hostname: teststore
Product Type: SUN ZFS STORAGE 7420
Summary:There may be some performance impact while the panic is copied to the savecore directory.

Fault event description:The system has rebooted after a kernel panic.
The system has rebooted after a kernel panic.Event-ID: 91f94bc6-398b-4bbf-cbc8-be07562e3d55
Auto-Response: None
Impact: None
Rec-Action: None
Event-ID: 91f94bc6-398b-4bbf-cbc8-be07562e3d55
Auto-Response: None
Impact: None
Rec-Action: None
Software Component:
Name:sw:///:path=/var/ak/core/.91f94bc6-398b-4bbf-cbc8-be07562e3d55
Description:

Changes

Cause

This alert is generic in nature which just indicates an unexpected system reboot because of kernel panic.

Solution

Make sure you are running one of the latest Appliance Firmware versions.

Please check whether this panic was generated as a result of NMI

This alert should have generated an ASR and Oracle Support Engineer will request the support bundle if needed for further analysis.

As this alert is generic in nature the Oracle Support Engineer will analyze the logs and provide you with the next course of action.

If the core size is bigger than the quota set or the available space, then the core file will not be saved.

Eg: You can use zfs set quota to increase the quota; i.e.:

node1# zfs get quota system/cores
node1# zfs set quota=150G system/cores
node1# zfs get quota system/cores
NAME          PROPERTY VALUE SOURCE
system/cores quota     150G   local
----------
Then manually save the core dump :
#savecore -dv                                  (this saves it to the default /var/ak/core directory; to save it elsewhere you can use 'savecore -dv -D new_dump_directory')

Refer: Running savecore Manually From the Command Line (Doc ID 1017457.1)

References

<NOTE:2021771.1> - Oracle ZFS Storage Appliance: Software Updates
<NOTE:1533606.1> - Sun Storage 7000 Unified Storage System: Alert 'defect.sunos.kernel.panic' may NOT actually mean that the system has had a kernel panic
<NOTE:1285455.1> - Oracle ZFS Storage Appliance: How to (and why) enable the Automated Service Request (ASR) Feature

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