Lucid Imagination, the makers of Lucene Java and Solr search, have merged these two project's codebase.
While the development code has been merged, the project artifacts will remain distinct.
"Lucene will remain a core search engine Java library and Solr will remain a search server built on top of Lucene," Lucid's statement said.
The Lucid development community hopes that this will greatly simplify development and bug fixing process.
"With merged dev, there is now a single set of committers across both projects. Everyone in both communities can now drive releases so when Solr releases, Lucene will also release easing concerns about releasing Solr on a development version of Lucene," Lucid said.