Github user xristy commented on the issue:
https://github.com/apache/jena/pull/335
@ajs6f I haven't thought about trying to do an in-place update of a text
index; however, perhaps one could use jena/textindexer with an assembler file
modified to create a Lucene index off-to-the-side and then halt the main server
and swap in the new index.---
