Error: bad allocation Failed to upload disk in Veeam backup

 

Issue:

When I try to backup Hyper-V environment got the below error, 

Error: bad allocation Failed to upload disk. Agent failed to process method {DataTransfer.SyncDisk}. Exception from server: Reconnectable protocol device was closed. Unable to retrieve next block transmission command. Number of already processed blocks: [825]. Failed to download disk 'FIleName.vhdx'.  

Cause:

Bad Allocation - This issue due to high usage of either CPU or memory.

Fix:

Checked the Hyper-V and found that the VM is using too many resources (both CPU and memory), try to reduce the resource usage or reboot the server to make server normal usage.

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Once server became normal backup started work normally.