Right now Solr defaults to Jaspell, but we've deprecated it in LUCENE-5775 ... and in trunk I'd like to remove it. But first we need to fix Solr to not default to it.
Change suggester default in Solr, because Jaspell is deprecated
Move JaSpell code into Solr and deprecate the factory
JaspellTernarySearchTrie.ramBytesUsed hits StackOverflowError