There are several versions of the JDK for the Solr server. Which version should be downloaded?
The recommended version is Java Development Kit 1.7, Windows x64 version, update 51 if using the 9.0 or 9.1 Ektron versions of Solr.
JDK 8 should be used for 9.2+ Ektron versions of Solr.
JDK 7 downloads
JDK 8 downloads