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Solaris Cluster on Oracle VM for SPARC (LDom): Split brain scenario in Virtual Network due to lack of Virtual Switch "mode=sc" Setting (Doc ID 2122795.1)

Last updated on JUNE 07, 2018

Applies to:

Solaris Cluster - Version 3.3 to 4.3 [Release 3.3 to 4.3]
Oracle Solaris on SPARC (64-bit)

Symptoms

One Solaris Cluster 4.x node panicked due to a split brain scenario.

Typical symptoms include messages like these (referring to the network interface used by cluster private network)

clcomm: Path nodeA:net1 - nodeB:net1 being drained

Followed a panic with one of these panic strings

CMM aborting
Reservation Conflict
Cluster Lost Operational Quorum
CMM: Unable to acquire the quorum device.

 The particular "split brain" scenario described in this document refers to Solaris Cluster systems  where each node of the cluster is a guest LDom and the private networks are built using  virtual networks cards

Changes

The Cluster has been recently installed (it's possible but unlikely to introduce this issue afterwards unless the private interconnect setup was changed radically )

Cause

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