How to install JTS in Solr 4?

Question

Using the Solr 4 spatial field types seems to require an external library, the Java Topology Suite. How does one install this suite for use with Solr 4.1.0 on Ubuntu Server 12.04 with Java 1.6.0_24?

Thank you.

Answer 1

If you are running Solr in Tomcat on your Ubuntu Server and have deployed the Solr WAR into your <path to Tomcat>/webapps folder. Then according to the Lucene / Solr 4 Spatial documentation on the Solr Wiki, you just need to copy the all the jar files from the JTS distribution /lib folder to the WEB-INF/lib folder where Solr is running.

Update

Since you are using Jetty to run Solr, you will need to include the location of the JTS jar files as a classpath. Based on the Classloading Jetty documentation, something like the following should work:

 java -Dsolr.solr.home=/mnt/SolrFiles/solr 
   -Djetty.class.path=<insert path to JTS here> -jar /opt/solr-4.1.0/example/start.jar

Answer 2

The JTS JAR file needs to be placed in the Solr web application's WEB-INF/lib folder. Otherwise you may encounter a NoClassDefFoundError: com/vividsolutions/jts/geom/Geometry when starting Solr.