Unable to Sync Larger Term Groups

[ajinkya-ghare]

####Which PnP repository should you use to report the issue?####

• PnP Samples - https://github.com/OfficeDev/PnP
  https://github.com/pnp/PnP/tree/master/Samples/Core.MMSSync

Category

[X] Bug

Environment

[X] Office 365 / SharePoint Online
[X] SharePoint 2019

If SharePoint on-premises, what's exact CU version:

Expected or Desired Behavior

Its should sync terms groups as per the threshold limits any for Term Store Sync

Observed Behavior

We are working on to sync the on premise term group to SharePoint online, we had installed the Solution https://github.com/pnp/PnP/tree/master/Samples/Core.MMSSync and had synced few groups, but when we are trying to sync larger term group, after 15 minutes it gives errors System.Net.WebException: 'The remote server returned an error: (429).' Failed to read from or write to database. Refresh and try again. If the problem persists, please contact the administrator