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Solaris Cluster "lost operational quorum; aborting" Panic on Node/System/Server Resolution Path (Doc ID 1020625.1)

Last updated on NOVEMBER 21, 2017

Applies to:

Solaris Cluster - Version 3.1 to 4.3 [Release 3.1 to 4.3]
Solaris Cluster Geographic Edition - Version 3.1 to 4.3 [Release 3.1 to 4.3]
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)

Purpose

This document will guide you through first steps in troubleshooting Sun/Solaris Cluster 3.x/4.x panics due to "lost operational quorum"

Symptoms: Solaris Cluster node panics with the following message:

Aug 12 13:19:42 node1 unix: [ID 265925 kern.notice] CMM: Cluster lost operational quorum; aborting.
 

Explanation:
A Solaris Cluster framework can stay up if the number of quorum votes present are one vote more than half the possible votes. Otherwise, the remaining cluster hosts(nodes) will panic with the above message. Each cluster node is assigned 1 vote. The number of votes for the quorum devices is determined by Solaris Cluster software based on the number of nodes and quorum devices (QD) attached such that, when all nodes except one go down, the votes present is sufficient for the remaining node to stay in the cluster. For example, in a 3 node cluster with 1 quorum device, each node has 1 vote whereas the only quorum device has 2 votes. Therefore, one node and the quorum device will form 3 votes out of possible 5.

See also: <Document 1010549.1> Solaris Cluster "lost operational quorum" Panic Explained

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 
1) Confirm running Solaris Cluster:
 2) Determine the number of possible votes:
 3) Find out if this is split brain situation, i.e private interconnect paths were disrupted prior to the panic:
 4) Check if quorum device had issues:
 5) Data Collection in a 'lost operational quorum' panic:
 6)  Open SR with Oracle Support
 Community Discussions
References

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