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javasearchindexingsolrsolrj

Delete an entire index with SolrJ

I'm using SolrJ to index articles on my site. Periodically, I'm going to want to clear the whole index and do a fresh re-index of all articles.

The ID of each entry is tied to the ID of the article (something to the effect of [blog ID]-[article ID]). I know that SolrJ has a deleteById() method, but if an article is removed from my site, I may lose access to its ID on the Java side, so I can't reliably iterate over all articles and call deleteById(). Is there any way to drop an entire index using SolrJ?

Solution

  • Use

    server.deleteByQuery( "*:*" );

    Then 

    server.commit()

    You should first delete by query, do a full index, and then commit, so that the old index remains until the new one is committed.