On Wed, 30 Sep 2009, Aaron Richton wrote:
(dbx) thread -blockedby t@5 Thread t@5 is blocked by: 0x00000001005d3578 (0x1005d3578): usync_? mutex(locked) Lock is unowned and the slapd is deadlocked.
Hmm...actually, this is with 2.4.18. But I don't know if there were changes on point since then?