text: Title: Azure: The specified block list is invalid
  Body: Hi,
  
  We're getting an error back from Azure on some uploads to block storage. I believe it happens when we're uploading large files, but I haven't been able to debug it much more. Here is the exception:
  
  <img width="834" alt="screenshot 2019-03-04 12 46 09" src="https://user-images.githubusercontent.com/25510/53744317-854fa680-3e7b-11e9-9613-3e10c960800a.png">
  
  I believe this blog post talks more about it: https://gauravmantri.com/2013/05/18/windows-azure-blob-storage-dealing-with-the-specified-blob-or-block-content-is-invalid-error/
  
  I'll try and get more details on this and figure out what's going on. 