VM resetting CBT failed causing VM snapshot grows & crashing

[albertwt]

Hi All,

Can anyone here please share your thoughts an comments regrading the issue that I'm currently having with my Exchange Server VM backup that was failed thus causing it to go offline ?

Here's the log from the email alert:

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Virtual disk configuration change detected, resetting CBT failed Details: Another task is already in progress.

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Processing PRODMBX02-VM Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: [PRODMBX02-VM IP]. Account: [DOMAIN\Service-VBR]. Win32 error:The network path was not found. Code: 53 '

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Failed to prepare guest for hot backup. Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: [PRODMBX02-VM IP]. Account: [DOMAIN\Service-VBR]. Win32 error:The network path was not found. Code: 53 '
Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: [PRODMBX02-VM IP]. Account: [DOMAIN\Service-VBR]. Win32 error:The network path was not found. Code: 53 '

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Removing VM snapshot (waiting for acceptable latency)
Removing VM snapshot (waiting for acceptable latency) Details: The operation has timed out
Error: Failed to open VDDK disk [[DCSSD_VMFS_01_vol_13] PRODMBX02-VM/PRODEXCMBX02-VM.vmdk] ( is read-only mode - [true] ) Failed to open virtual disk Logon attempt with parameters [VC/ESX: [VCENTER IP];Port: 443;
Login: [DOMAIN\administrator];VMX Spec: [moref=vm-3079];Snapshot mor: [snapshot-171467];Transports: [hotadd:nbd];Read Only: [true]] 
failed because of the following errors: Failed to open disk for read. Failed to upload disk. Agent failed to process method {DataTransfer.SyncDisk}. 

Any help and suggestion would be greatly appreciated.

Thanks.

Note: Veeam Support - Case # 01098218

[albertwt]

Here's what the email alert from VCenter shows about the snapshot size:

Monday, 2 November 2015 7:03 PM – the VM backup for PRODMBX02-VM starting, the VM snapshot grows to 9,467,968KB
Tuesday, 3 November 2015 7:03 AM – the VM backup for PRODMBX02-VM still on going, the VM snapshot size stuck at 9,467,968KB
Tuesday, 3 November 2015 9:28 AM – the VM backup for PRODMBX02-VM still on going, the VM snapshot size grows to 145,569,824KB