How to Install Apache Solr
Requirements
Java5 or greater installed
A servlet container such as Tomcat, Jetty, or Resin
A Solr distribution
Setup
Stop your servlet container
From the solr distribution, copy the solr war to the webapps directory of your servlet container as solr.war
From the solr distribution, copy the example solr home example/solr as a template for your solr home.
Start the servlet container, passing the location of your solr home. This may be done in a number of ways:
Set the java system property solr.solr.home to your solr home.
Configure the servlet container such that a JNDI lookup of “java:comp/env/solr/home” by the solr webapp will point to the solr home.
The default solr home is “solr” under the JVM’s current working directory ($CWD/solr), so start the servlet container in the directory containing ./solr
Go to the solr admin page to verify that the installation is working. It will be at http://localhost:8080/solr/admin
The servlet container may have started on a port other than 8080… check the servlet containers documentation if you don’t know what this is.
If there is already a servlet container running at that port, yours may fail to start. Shut down the other one or change the port that yours is running at.
For more information visit http://wiki.apache.org/solr/SolrInstall