There's no point in moving it to Solr core unless something in core
depends on it.
The VelocityResponseWriter depends on commons-lang, though, and I am
aiming to integrate that into core at some point.
But, you can put commons-lang in your /lib and your plugin
will be able to see it
We have a solr plugin that would be much easier to write if commons-lang was
available. Why does solr not have this library? Is there any drawbacks to
pulling in the commons lang for StringUtils?
--
Jeff Newburn
Software Engineer, Zappos.com