Hi Sanne Grinovero, thanks for a quick response!

What I was implying on, talking about exclusive_index_use, that we have multiple JVMs which share the same FS index, and thus we have a lot of org.apache.lucene.store.LockObtainFailedException, which causes indexing batches to fail. Though that the other story

With your explanation that totally make sense. Could it be reflected in the documentation somehow? Maybe a short line anywhere, as I didn't find anything.