> Is there an http request that can make all the cores on a solr server > reload?
I don’t think there is, but you can use the STATUS API call (https://solr.apache.org/guide/8_11/coreadmin-api.html <https://solr.apache.org/guide/8_11/coreadmin-api.html>) to get a list of all the cores so that you can call the RELOAD command. Andy
