Error "Internal Server Expected - Expected completed future, but received future which is still in progress." when reverting snapshot on VMs in VMware Cloud Director

Products

• VMware Cloud Director

Issue/Introduction

• When the revert to snapshot task is initiated in VMware Cloud Director (VCD) the task stays in a running state for some time.

• VM cannot be powered on or deleted from VCD

• In vCenter, the task is successfully initiated but there are no other tasks/events related to the snapshot.

• Snapshot creation and revert works as expected directly from the vCenter.

• The issue affects new VMs both created from template, fresh VMs with VMTools installed as well as existing VMs. 

• The revert task is failing with the error below:

  Internal Server Expected - Expected completed future, but received future which is still in progress.


• The snapshot stays present in VCD after it has reverted in vCenter

Environment

VMware Cloud Director 10.6
VMware Cloud Director 10.5

Cause

There is a known issue with the revert snapshot logic when vSAN storage is used.

Resolution

For non-vSAN ESA Datastores, this issue has been resolved in VMware Cloud Director 10.6.1. This can be seen in the release notes below:

VMware Cloud Director 10.6.1 Release Notes

For vSAN ESA Datastores, this is currently a known issue with no workaround.