Please educate me on DNS cache

[warmongr]

This is a snippet from my logs on my DNS server where someone fetched from sub.litplanet.com. I'm just trying to get a breakdown of what all this means. There are obvious statements such as time hacks and createfetch etc but then there's the fctx, resquery statements and then some weirdness whereby it does a createfetch ie
"createfetch: sub.litplanet.com.bumblebee.edu A" where bumblebee.edu is my domain. What the heck is that? Any assist would be appreciated even if a reference to somewhere else (other than hell).

fyi: bumblebee.edu is not real. This was edited to protect my domain.

snip ----------------

10-Mar-2008 13:40:39.260 resolver: debug 1: createfetch: sub.litplanet.com A
10-Mar-2008 13:40:39.260 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): create
10-Mar-2008 13:40:39.260 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): join
10-Mar-2008 13:40:39.260 resolver: debug 3: fetch 24ce28 (fctx c08470(sub.litplanet.com/A)): created
10-Mar-2008 13:40:39.260 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): start
10-Mar-2008 13:40:39.261 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): try
10-Mar-2008 13:40:39.261 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelqueries
10-Mar-2008 13:40:39.261 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): getaddresses
10-Mar-2008 13:40:39.261 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): query
10-Mar-2008 13:40:39.261 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): send
10-Mar-2008 13:40:39.261 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): sent
10-Mar-2008 13:40:39.261 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): senddone
10-Mar-2008 13:40:39.283 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): response
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): noanswer_response
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cache_message
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelquery
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelqueries
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): try
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelqueries
10-Mar-2008 13:40:39.284 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): getaddresses
10-Mar-2008 13:40:39.285 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): query
10-Mar-2008 13:40:39.285 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): send
10-Mar-2008 13:40:39.286 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): sent
10-Mar-2008 13:40:39.286 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): senddone
10-Mar-2008 13:40:39.306 database: debug 1: decrement_reference: delete from rbt: f82f38 ns1.litplanet.com
10-Mar-2008 13:40:39.307 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): finddone
10-Mar-2008 13:40:39.480 resolver: debug 3: resquery c0f470 (fctx c08470(sub.litplanet.com/A)): response
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): noanswer_response
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): ncache_message
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): clone_results
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelquery
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): done
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): stopeverything
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelqueries
10-Mar-2008 13:40:39.481 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): sendevents
10-Mar-2008 13:40:39.481 resolver: debug 3: fetch 24ce28 (fctx c08470(sub.litplanet.com/A)): destroyfetch
10-Mar-2008 13:40:39.482 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): shutdown
10-Mar-2008 13:40:39.482 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): doshutdown
10-Mar-2008 13:40:39.482 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): stopeverything
10-Mar-2008 13:40:39.482 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): cancelqueries
10-Mar-2008 13:40:39.482 resolver: debug 3: fctx c08470(sub.litplanet.com/A'): destroy
10-Mar-2008 13:40:39.486 resolver: debug 1: createfetch: sub.litplanet.com.bumblebee.edu A
10-Mar-2008 13:40:39.486 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): create
10-Mar-2008 13:40:39.486 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): join
10-Mar-2008 13:40:39.486 resolver: debug 3: fetch 24ce28 (fctx a81408(sub.litplanet.com.bumblebee.edu/A)): created
10-Mar-2008 13:40:39.486 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): start
10-Mar-2008 13:40:39.486 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): try
10-Mar-2008 13:40:39.487 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): cancelqueries
10-Mar-2008 13:40:39.487 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): getaddresses
10-Mar-2008 13:40:39.487 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): query
10-Mar-2008 13:40:39.487 resolver: debug 3: resquery a88408 (fctx a81408(sub.litplanet.com.bumblebee.edu/A)): send
10-Mar-2008 13:40:39.487 resolver: debug 3: resquery a88408 (fctx a81408(sub.litplanet.com.bumblebee.edu/A)): sent
10-Mar-2008 13:40:39.487 resolver: debug 3: resquery a88408 (fctx a81408(sub.litplanet.com.bumblebee.edu/A)): senddone
10-Mar-2008 13:40:39.515 resolver: debug 3: resquery a88408 (fctx a81408(sub.litplanet.com.bumblebee.edu/A)): response
10-Mar-2008 13:40:39.516 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): noanswer_response
10-Mar-2008 13:40:39.516 resolver: debug 3: fctx a81408(sub.litplanet.com.bumblebee.edu/A'): ncache_message

snip ---------------------------------------------------