If this is a one-time cleanup, not something you need to do programmatically,
you could delete the index directory ( <solrDir>/data/index ). In my case I
have to stop Tomcat, delete .\index and restart Tomcat. It is very fast and
starts me out with a fresh, empty, index. Noticed you are multi-core, I'm
not, so this could be bogus information for you...but thought I'd toss it
out just in case.
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