We restored production data to a test environment, went through the upgrade from 3.3.4 to 4.5.2 with few issues...EXCEPT one potential show stopper - following the upgrade, scanning and indexing started on all the repos. The first time we tried this (couple of weeks ago), the reindexing took 5 days. The second attempt has been indexing for about 24 hours so far.
Why is this happening? It can't be a desired behavior, right?