added to IndexReIndexMonitor_p.html
Selects existing documents from index and feeds it to the crawler.
currently only the field fresh_date_dt is used determine documents for recrawl (fresh_date_dt:[* TO NOW-1DAY]
Documents are added in small chunks (200) to the crawler, only if no other crawl is running.
for internal Solr indexes. This is mainly caused by the fact that an
external Solr may be also a SolrCloud which do not support LukeRequests,
which are needed to request the old Schema.
was optional and another alternative metadata store was available. Since
that store is now removed, Solr is always available (internally or
externally)