How To Debug Solr With Eclipse by Doug Turnbull.
From the post:
Recently I was puzzled by some behavior Solr was showing me. I scratched my head and called over a colleague. We couldn’t quite figure out what was going on. Well Solr is open source so… next stop – Debuggersville!
Running Solr in the Eclipse debugger isn’t hard, but there are many scattered user group posts and blog articles that you’ll need to manually tie together into a coherent picture. So let me do you the favor of tying all of that info together for you here.
This looks very useful.
Curious of there are any statistical function debuggers?
That step you through the operations and show the state of values as they change?
Thinking that could be quite useful as a sanity test when the numbers just don’t jive.