My mapping seems to get corrupted sometime.
A simple mapping such as:
suddenly losses the "_parent" part after several indexing operations
I cannot recreate this, as this happens randomly, as far as I can tell.
When it happens, all the "_parent" fields of existing docs also vanish.
I most definetely do no mapping API calls that could cause this.
Only _index (with autogenereated IDs)
When can (or is it possible for) an index operation change the mapping???