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PowerChute Network Shutdown shuts down an ESXi host in vSAN cluster before it has been moved to maintenance mode.

Issue:
PowerChute Network Shutdown shuts down an ESXi host in vSAN cluster before it has been moved to maintenance mode.

Product Line:
PowerChute Network Shutdown (PCNS) version 4.2

Environment:
  • vSAN cluster containing 3 x VMware ESXi 6.5 Hosts (H1, H2, H3)
  • All servers are protected by 1 UPS
  • PowerChute and vCenter Server are installed on a physical server outside the HA cluster
  • Data is located on ESXi Hosts H1 & H2, H3 is a witness server, VM setting is "FTT = 1"
Symptoms:
  • PowerChute starts a shutdown sequence and the hosts set to move to maintenance mode
  • ESXi hosts H1 and H3 move to maintenance mode as expected
  • ESXi host H2 does not move to maintenance mode
Note: The following message appears in the Event Log indicating that a host has failed to enter maintenance mode:

Failed to enter maintenance mode on Host <H2>
  • ESXi hosts H1, H2 & H3 are shut down.
Cause:
There is a known VMware issue whereby the last host is unable to move to maintenance mode.

Resolution:
Upgrade to PowerChute Network Shutdown 4.3
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