It’s been a long wait, and now it’s here – the release of Solr version 3.1. The 1.4.1 release was in June 2010, and for various reasons there was never a 1.4.2 nor a 1.5 release. Part of the reason is the merge of Lucene and Solr codebase which is also why the version number is 3.1 instead of 1.5.
So what’s new? For me, the single most important features are the Extended Dismax parser (SOLR-1553) and Geospatial search. The full list of improvements is found in CHANGES.TXT, but here are my favorites: