One thing that is particularly useful when debugging Kamaelia systems - especially servers - is the ability to dump out what's running. Fortunately Kamaelia provides a mechanism to introspect the scheduler, so you can do this as follows:

import time
import Axon
from Kamaelia.Chassis.Pipeline import Pipeline
from Kamaelia.Util.Console import ConsoleEchoer

class PeriodicWakeup(Axon.ThreadedComponent.threadedcomponent):
    interval = 300
    def main(self):
        while 1:
            time.sleep(self.interval)
            self.send("tick", "outbox")

class WakeableIntrospector(Axon.Component.component):
    def main(self):
        while 1:
            Q = [ q.name for q in self.scheduler.listAllThreads() ]
            Q.sort()
            self.send("*debug* THREADS"+ str(Q), "outbox")
            self.scheduler.debuggingon = False
            yield 1
            while not self.dataReady("inbox"):
                self.pause()
                yield 1
            while self.dataReady("inbox"):
                self.recv("inbox")

Pipeline(
    PeriodicWakeup(),
    WakeableIntrospector(),
    ConsoleEchoer(),
).activate()

Note: this construct won't shutdown.
This produces output of the following kind:

*debug* THREADS['Kamaelia.Chassis.Pipeline.Pipeline_11', 'Kamaelia.Chassis.Pipeline.Pipeline_7', 'Kamaelia.Internet.TCPClient.TCPClient_9', '__main__.Listener_10', '__main__.PeriodicWakeup_5', '__main__.WakeableIntrospector_6']

This turns out to be, as you might expect, to be particularly useful.