I'd like to add a followup to this thread from 3 years ago, in case anyone may find it in the future as I just did doing a search for something. Keith's last note had discussed how to modify the solr jvm configuration file (solr.lax in CF9) to point to a new JVM.
He had said the line to modify was that for lax.nl.currentvm but instead it's than lax.nl.current.vm. I clarify this as much for those who may be searching for references to it, so they may find this discussion.
Also, FWIW for future readers, in CF10+ the file is now instead called jetty.lax and is also located in a different directory: \[cf10]\cfusion\jetty, or [cf10]\[instancename]\jetty if you have created a new CF10 Enterprise instance.
Hope that's helpful.