This article helps in troubleshooting issues when you create or commit snapshots in ESXi/ESX.

Symptoms:

• You cannot take a snapshot of the virtual machine.
• You cannot commit the snapshot of the virtual machine.
• You cannot delete snapshots off the virtual machine.
• There are no snapshots visible in Snapshot Manager.
• You see one or more of these errors:
   
  • Create virtual machine snapshot VIRTUALMACHINE File <unspecified filename> is larger than the maximum size supported by datastore '<unspecified datastore>'
  • The parent virtual disk has been modified since the child was created.
  • Snapshot guest failed: The file is too big for the filesystem.
  • Failed to lock the file.
  • Failed to do snapshot op: Error: (21) The file is too big for the datastore.
  • Could not power on VM: No space left on device. Failed to power on VM.
  • An unexpected error was received from the ESX host while powering on vm-##.
  • Configuration of host IP address is inconsistent on host <hostname>: address resolved to <IP Address> and <IPAddress>
  • Too many levels of redo logs.
  • Not enough disk space.
  • VMControl error -3: Invalid arguments.
  • Cannot complete the operation because the file or folder [DatastoreName] VMname/VMname.vmx already exists.
  • CID Mismatch.
  • Maximum Iteration reached - 32.

VMware vSphere ESXi 7.0.0
VMware vSphere ESXi 7.0.x
VMware ESX 4.0.x
VMware vCenter Server 5.5.x
VMware vSphere ESXi 6.5
VMware ESXi 4.1.x Installable
VMware ESXi 3.5.x Installable
VMware VirtualCenter 2.5.x
VMware ESX Server 1.5.x
VMware vSphere ESXi 6.7
VMware vSphere ESXi 5.1
VMware ESX 4.1.x
VMware ESX Server 3.0.x
VMware vCenter Server 6.0.x
VMware vCenter Server 4.1.x
VMware vCenter Server 5.1.x
VMware ESX Server 3.5.x
VMware ESXi 4.0.x Installable
VMware ESXi 3.5.x Embedded
VMware vSphere ESXi 6.0
VMware ESXi 4.1.x Embedded
VMware vSphere ESXi 5.5
VMware ESX Server 1.x
VMware ESXi 4.0.x Embedded
VMware vCenter Server 4.0.x
VMware vSphere ESXi 5.0
VMware vCenter Server 5.0.x

For more information, see Best practices for virtual machine snapshots in the VMware environment (1025279).
Reverting a snapshot fails with a permission denied error
Investigating disk space on an ESX or ESXi host
Collecting diagnostic information in a VMware Virtual Infrastructure Environment
Investigating an out of resources error on a datastore
[INTERNAL] Committing snapshots in vSphere when more than 32 levels of snapshots are present fails with the error: Too many levels of redo logs
Investigating virtual machine file locks on ESXi
Committing snapshots from within the Service Console
"The parent virtual disk has been modified since the child was created" error
Unable to create snapshot: Operation failed because file already exists or Cannot complete the operation because the file or folder [DatastoreName] VMname/VMname.vmx already exists
Unable to commit virtual machine snapshots because another task is in progress
Creating a snapshot for an ESXi/ESX virtual machine fails with the error: File is larger than maximum file size supported
Snapshot Manager fails to detect snapshots of VMs
VMware ESXi/ESX でスナップショットの作成またはコミット時に発生する問題のトラブルシューティング
对在 VMware ESXi/ESX 中创建或提交快照时的问题进行故障排除