The "Reconfigure Virtual Machine" task appears in the recent tasks list

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• Frequent "Reconfigure Virtual Machine" task appear in the recent task list in SRM DR page UI.

• ESXi host(s) goes into not responding for few seconds intermittently.
• vCenter Server is randomly losing ESXi heartbeats.
  
  
• This vCenter Server /var/log/vmware/vpxd/vpxd.log file contains entries similar to:
  
  [<YYYY-MM-DD>T<time> verbose 'App'] [VpxdIntHost] Missed 2 heartbeats for host esx.example.com

Environment

VMware Site Recovery Manager 8.x
VMware Live Site Recovery 9.x

Cause

The firewall was blocking UDP port 902, preventing heartbeat communication between the ESXi hosts and the vCenter Server

Below command can be used to confirm if the heartbeats that are being sent by the ESXi host, but not reaching the vCenter via UDP 902 port.

• To be run from ESXi host:

esxi# tcpdump-uw dst host <vcenter_ip_address> and udp port 902

• To be run from vCenter server

  vcsa# tcpdump src host <esxi_host_ip_address> and udp port 902

Resolution

Please allow bi-directional communication on Firewall for the UDP port 902 between the vCenter and ESXi host.

 

Additional Information

To Test connectivity between the host and the vCenter Server on port 902, please refer the below article:
 ESXi host disconnects intermittently from vCenter Server