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Hello,
   i see this in impl_rabbit.py  
        # NOTE(sileht): if purpose is PURPOSE_LISTEN
        # the consume code does the heartbeat stuff
        # we don't need a thread
        self._heartbeat_thread = None
        if purpose == rpc_common.PURPOSE_SEND:
            self._heartbeat_start()



 When a create a batch listener, i do not find where it start the heartbeat?
Can someone help me point it out?


Thanks...
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