New answers tagged crawling
As per http://technet.microsoft.com/en-us/library/cc262787(v=office.15).aspx#Search a managed property can only store 1000 unique values per item. Your message says over 3000.
Looks like this issue is related to space on the disk holding the index. We started with a small disk with only around 5GB and apparently these errors started to show up when there was around 1GB left on that disk. We resized the disk for the index and after that we were able to index all items on the fileshare without these errors.
Top 50 recent answers are included