Terminology If you use Solr for any length of time, someone will eventually tell you that you have to reindex after making a change. It comes up over and over ... but what does that actually mean? Most changes to the schema will require a reindex, unless you only change query-time behavior. A very small subset of changes to solrconfig.xml also require a reindex, and for some changes, a reindex is recommended even when it's not required. The term "reindex" is not a special thing you can do with Solr. It literally means "index again." You just have to restart Solr (or reload your core) and then repeat whatever actions you took to build your index in the first place. Indexing (and reindexing) is not something that just happens. Solr has no ability to initiate indexing itself. There is the dataimport handler, but it will not do anything until it is called by something external to Solr. Indexing is something that can be manually done by a person or automatically done by a program,
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