Apache Solr, the popular open source enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, OutOfMemoryError: Java heap space at org.apache.lucene.search. Windchill PDM Essentials 10.2 to 11.1; PTC Arbortext Content Manager 10.2 to 11.1I'm trying to generate a Java file indexer with the help of Lucene. I followed this guide of iMasters and I tried Field; import org.apache.lucene.index. Apache Lucene is an open source Java based full- text search engine. Lucene is not a Web application, but rather a code library and API that can easily be Apache LuceneTM is a free open-source , high-performance, full-featured text search engine library that has been written completely in Java.