Upload Incomplete: Some blocks of the VHD failed to upload, rerun the command to upload those blocks

[wozgonon]

I see the above error message in the title after trying to upload a VHD to Azure:

Effective upload size: 27092.00 MB (from 28612.00 MB originally)

I see a large number of messages of the form:

{29808918528, 29811015679}: storage: service returned error: StatusCode=503, ErrorCode=ServerBusy, ErrorMessage=The server is busy.

No matter how many times I rerun the command I see the same kind of errors.
Any advice would be greatly appreciated.

Many Thanks

[irab]

503's would be an issue with the servers hosting the Azure storage platform. You should probably raise a support ticket with Microsoft.

[jepio]

I had the same issue and got metadata mismatch errors on second run (even though printed metadata was identical). But I found I don't get 503's if I reduce parallelism (from 128 to 8).