Howdy Couple of things about the ValueSourceParser
#1 Change documentation of http://wiki.apache.org/solr/SolrPlugins#ValueSourceParser to say extends ValueSourceParser rather than implements. #2 There's an AbstractMethodError when you extend ValueSourceParser and don't override the init(NamedList args) method because SolrCore:~439 createInitInstance, cast's the plugin class as a NamedListInitializedPlugin, and call's ((NamedListInitializedPlugin) o).init(info.initArgs); If your extended ValueSourceParser class doesn't provide an override, then there's nothing that implements the base interface from NamedListInitializedPlugin. Providing a head scratching conundrum that should be avoided. Seems more than a documentation fix Patrick
