I found a bug while browsing the queue code and managed to reproduce it in a small setup.

If a queue uses the ringall strategy, it was possible through unfortunate coincidence for a single member at a given penalty level to
make app_queue think that all members at that penalty level were unavailable and cause the members at the
next penalty level to be rung. With this patch, we will only move to the next penalty level if ALL the members
at a given penalty level are unreachable.



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@95095 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -1922,17 +1922,15 @@ static int ring_one(struct queue_ent *qe, struct callattempt *outgoing, int *bus
 				if (cur->stillgoing && !cur->chan && cur->metric <= best->metric) {
 					if (option_debug)
 						ast_log(LOG_DEBUG, "(Parallel) Trying '%s' with metric %d\n", cur->interface, cur->metric);
-					ring_entry(qe, cur, busies);
+					ret |= ring_entry(qe, cur, busies);
 				}
 			}
 		} else {
 			/* Ring just the best channel */
 			if (option_debug)
 				ast_log(LOG_DEBUG, "Trying '%s' with metric %d\n", best->interface, best->metric);
-			ring_entry(qe, best, busies);
+			ret = ring_entry(qe, best, busies);
 		}
-		if (best->chan) /* break out with result = 1 */
-			ret = 1;
 	}
 
 	return ret;