"Failed to place witnesses. There are currently 0 usable disks and 1 more usable disks are needed in witness node" on a non-stretch cluster while creating VM.

Products

• VMware vSAN

Issue/Introduction

Symptoms:

• Failed to place witnesses. There are currently 0 usable disks and 1 more usable disks are needed in witness node.
• Failed to create object.
• clomd.log shows the following entry:
  2016-05-25T10:51:55.969Z 1000047947 CLOM_Diagnose: Failed to place witnesses. There are currently 0 usuable disks and 1 more usable disks are needed in witness node.

Note: If vSAN is NOT in a stretched cluster configuration a witness node is not needed.

Environment

VMware vSAN 6.0

VMware vSAN 7.0

Cause

While disabling the stretched cluster we do not clear "stretchedClusterMode" flag under certain conditions.

Host improperly removed from a stretch cluster and then added to another non-stretch cluster.

Improper stretch cluster decommission.

Resolution

 

If the above symptoms and issue matches, please contact Broadcom Support to investigate the issue

Additional Information

Impact/Risks:

VM/snapshot creation fails