Unable to migrate to v15

Questions
1

I have a v13 site which I am trying to upgrade to v15 without success. I can upgrade successfully as far as v14.3.1 and the site is responsive/backend is fast. As soon as I upgrade to any v15 version (which appears to be successful), the site is unusable and I get persistent lock errors/db timeouts. I have tried:

  • the parallel migrator composer
  • disabling the block editor migrations

Typical errors are: Umbraco.Cms.Core.DistributedLocking.Exceptions.DistributedReadLockTimeoutException: Failed to acquire read lock for id: -336. (although not always 336, it could be any of them).

Microsoft.Data.SqlClient.SqlException (0x80131904): Lock request time out period exceeded.

This definitely appears to be something related to the v15 upgrade. Has anyone else experienced similar, and if so were you able to overcome?

2

i think before i comment this its already fixed. when i get this error which is i think caused by huge memory usages with the db, i would clear cache and recycle app pool if ur using IIS.
everything works right? just save and puclish and other events showing this issue i assume