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We have configured 5-6 window schedulers to call powerShell scripts to fetch the OneDrive content. but PnP powershell script throwing below errors on the VM event viewer:

  1. Faulting application name: dwm.exe, version: 10.0.19041.1, time stamp: 0x9a82ecd.
  2. The storage optimizer couldn't complete slab consolidation on Temporary Storage.
  3. Faulting application name: PowerShell.EXE, version: 10.0.19041.1, time stamp: 0xc37343ae Faulting module name: KERNELBASE.dll,
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  • HTTP 429 means you're being throttled. Can you instead state what you're attempting to do so we can offer advice on that?
    – user6024
    Aug 2, 2020 at 1:39
  • yes its throttling issue , we are migrating content from OneDrive to SharePoint Online..can we identify throttling by PS script and fix it.? Aug 2, 2020 at 3:46
  • The best you can do is not migrate during business hours. I would also use a 3rd party migration tool, like Sharegate. It will handle the throttling for you, but you won't avoid throttling as you're migrating between online services.
    – user6024
    Aug 2, 2020 at 3:56

1 Answer 1

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If you are receiving an HTTP 429 response, then it is likely that you are being throttled. Microsoft have provided documentation on how to avoid being throttled:

https://docs.microsoft.com/en-us/sharepoint/dev/general-development/how-to-avoid-getting-throttled-or-blocked-in-sharepoint-online

An important way of dealing with throttling is using the Retry-After HTTP header. This is clarified by Microsoft in their advice:

If you do run into throttling, we require leveraging the Retry-After HTTP header to ensure minimum delay until the throttle is removed.

The Retry-After HTTP header is the fastest way to handle being throttled because SharePoint Online dynamically determines the right time to try again. In other words, aggressive retries work against you because even though the calls fail, they still accrue against your usage limits. Following the Retry-After HTTP header will ensure the shortest delay.

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