public void start(String props, int num_threads, long interval, boolean discard_local) throws Exception {
channel=new JChannel(props);
if(discard_local)
channel.setOpt(Channel.LOCAL, Boolean.FALSE);
disp=new RpcDispatcher(channel, null, this, this);
channel.connect("RpcDispatcherStressTestGroup");
threads=new Publisher[num_threads];
results=new int[num_threads];
for(int i=0; i < threads.length; i++) {