In the following configurations, it is possible for a node in an Oracle Solaris Cluster to encounter a panic when a cluster member reboots.
The cluster is comprised of three or more Oracle VM Server 3.5 guests.
The cluster quorum device (as described in the Oracle Solaris Cluster 4.3 Concepts Guide, Chapter 2, "Key Concepts") is a virtual disk whose physical storage is provided by SAN Fiber-Channel storage devices.
A restart of one member of the cluster triggers another node to panic with the following message:
panic[cpu28]/thread=c0400b4cb2640: CMM: Unable to acquire the quorum device. 2017-07-10/00:44:16 ereport.cpu.generic-sparc.l3data-return@/SYS
Workaround
Adjust the "qd_acquisition_timer" to 90, as described in the Oracle Solaris Cluster 4.3 Software Installation Guide, Chapter 3, "How to Configure Quorum Devices".Refer to the subsection "Unreachable quorum device" for information about adjusting the "qd_acquisition_timer."