Hi,
I have a vSAN all-flash cluster made up of 3 nodes and randomly one of the vSAN nodes Maintenance Mode States turns on
[root@dc-esx01:~] esxcli vsan cluster get
Cluster Information
Enabled: true
Current Local Time: 2017-07-15T10:49:45Z
Local Node UUID: 59014f2d-bb88-59c8-b1d6-74867ad76bb2
Local Node Type: NORMAL
Local Node State: BACKUP
Local Node Health State: HEALTHY
Sub-Cluster Master UUID: 59031dba-ae5a-537c-db7c-90b11c4bfc5b
Sub-Cluster Backup UUID: 59014f2d-bb88-59c8-b1d6-74867ad76bb2
Sub-Cluster UUID: 527cd5ae-f4ac-d995-29dc-9e574af264ae
Sub-Cluster Membership Entry Revision: 2
Sub-Cluster Member Count: 3
Sub-Cluster Member UUIDs: 59031dba-ae5a-537c-db7c-90b11c4bfc5b, 59014f2d-bb88-59c8-b1d6-74867ad76bb2, 590a9d3a-cd52-76d2-19eb-d067e5ee0800
Sub-Cluster Membership UUID: 92855459-3af9-e566-deb2-90b11c4bfc5b
Unicast Mode Enabled: true
Maintenance Mode State: ON
If I run "esxcli vsan maintenancemode cancel" on the host it comes good for what seems to be a completly random amount of time.
Last time it occurred was 2 weeks ago where it happened 5 times in a day then not again until approx 3hrs ago.
Any assistance you can provide would be greatly appreciated
Please let me know if you require any further information/logs