VM crashed (freeze) during vcbSnapshot

Hello,

I'm using a script (VISBU) in order to backup all VMs on 5 esx 3.0.2 clusters. Recently, some VMs just crashed (freeze) during the process :

- VM console "black"

- Vm not responding to ping request

- impossible to restart using the VM console

- unable to restart using the vmware-cmd stop hard

Finally, I had to kill the vcbsnapshot and reboot the ESX servers.

I've checked the script + the esx logs and it found the problem is due to the vcbSnapshot command (!). Here what happened during vcbSnapshot :

• - pre-freeze-script (not executed since we don't have one)

• - start sync driver

• - snapshot VM

• - stop sync driver

• - post thaw-script (not executed since we don't have one)

And then, nothing.... Like the vcbScript freeze and the VM too... from what I know, the next step for vcbSnapshot should be to export the VMDk file.

I've attached some logs (failed + success vcbSnapshot)

I can't find any answer anywhere... Maybe someone have any clue on that problem ?

Failed vcbSnapshot :

2008-06-27 01:07:57.584 'vm:/vmfs/volumes/483410e7-561678ec-83a0-001cc442b142/VM002/VM002.vmx' 88832944 verbose Create snapshot request recieved: Scripted Backup Snapshot, , false, true

2008-06-27 01:07:57.584 'vm:/vmfs/volumes/483410e7-561678ec-83a0-001cc442b142/VM002/VM002.vmx' 88832944 verbose Tools version status: ok

2008-06-27 01:07:57.584 'vm:/vmfs/volumes/483410e7-561678ec-83a0-001cc442b142/VM002/VM002.vmx' 88832944 verbose VMware Tools are current in guest: true

Registered Foundry callback on 2

Adding task: haTask-256-vim.VirtualMachine.createSnapshot-247605

VM State transition requested to VM_STATE_CREATE_SNAPSHOT

State Transition (VM_STATE_ON -> VM_STATE_CREATE_SNAPSHOT)

VM State transition post act for VM_STATE_CREATE_SNAPSHOT

Resetting power state handler

Createsnapshot request queued

About to run script: c:\windows\pre-freeze-script.bat all

Script c:\windows\pre-freeze-script.bat not found in VM.

About to engage SYNC driver, freeze Timeout 15 sec.

Dummy foundry callback #215

Sync driver Freeze successful.

Starting to snapshot VM.

Dummy foundry callback #216

Tracking progress for method : vim.VirtualMachine.createSnapshot

Snapshot guest reported no errors.

Disengaging SYNC driver.

Dummy foundry callback #217

Sync driver Thaw was successful.

About to run script: c:\windows\post-thaw-script.bat all

Dummy foundry callback #218

Updating config data

Successful vcbSnapshot :

Create snapshot request recieved: Scripted Backup Snapshot, , false, true

Tools version status: ok

VMware Tools are current in guest: true

Registered Foundry callback on 2

Adding task: haTask-224-vim.VirtualMachine.createSnapshot-247549

VM State transition requested to VM_STATE_CREATE_SNAPSHOT

State Transition (VM_STATE_ON -> VM_STATE_CREATE_SNAPSHOT)

VM State transition post act for VM_STATE_CREATE_SNAPSHOT

Resetting power state handler

Createsnapshot request queued

About to run script: c:\windows\pre-freeze-script.bat all

Script c:\windows\pre-freeze-script.bat not found in VM.

About to engage SYNC driver, freeze Timeout 15 sec.

Dummy foundry callback #210

Sync driver Freeze successful.

Starting to snapshot VM.

Dummy foundry callback #211

Tracking progress for method : vim.VirtualMachine.createSnapshot

Snapshot guest reported no errors.

Disengaging SYNC driver.

Dummy foundry callback #212

Sync driver Thaw was successful.

About to run script: c:\windows\post-thaw-script.bat all

Dummy foundry callback #213

Script c:\windows\post-thaw-script.bat not found in VM.

Dummy foundry callback #214

DISKLIB-VMFS : "/vmfs/volumes/483410e7-561678ec-83a0-001cc442b142/VM001/VM001-000001-delta.vmdk" : open successful (21) size = 17179869184, hd = -1. Type 8

...

Time to gather snapshot file layout: 138 (msecs)

Completed operation

Updating config data