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< PCA / OVM > Compute Nodes / OVM Servers (OVS) Self-fence (reboot via kernel panic) After Extended Failure of a Clustered Storage Device (Doc ID 2423328.1)

Last updated on AUGUST 04, 2018

Applies to:

Private Cloud Appliance - Version 2.0.5 and later
Oracle VM - Version 3.2.1 and later
Linux x86-64

Symptoms

Compute nodes / OVM Servers suffer a kernel panic upon extended loss of access to non-heartbeat clustered storage device.

If all paths to the storage are lost, and multipath cannot access any of them, OCFS2 invokes a kernel panic:

The dm-24 device above where the error has been raised is a multipath device of a repository, not the global heartbeat device (OVM "pool filesystem").

 

Changes

In the example reported, testing was being performed to establish consequences of complete failure of a storage device; previously the issue had occurred in a production PCA system when an external storage device completely failed, not even able to provide fail-over to another path.

Cause

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