I'm still not sure why anything else is effected by this. I am able to connect directly to MySQL and do queries in any of the other databases.
Ah, wait a second. Just found why your other forum is hanging. It's currently running this:
OPTIMIZE TABLE fbb_sessions, fbb_cache, fbb_logs, fbb_search......
So, it's basically doing a Repair by sorting, the same type of repair that is done to rebuild the indexes. The queries on that forum are waiting for that to be finished, as of right now that database is locked as well, but unrelated to the threads locked database.
