I am getting an indexing crash which show as follows in the log file:
Error ID: 6143
Error detail: CorruptIndexException: Document ID is out of range.
I tried deleting the LibraryIndex folder, but got the same error (and now no index!)
I did note several metadata warnings in the logos.log file along the lines of:
2018-12-01 08:31:14.6196 5 Warn MetadataServiceUtility Invalid ResourceId (LLS:12.40.1031), Version (2015-05-15T22:35:51Z), or ResourceType (); rejecting metadata record.