}
protected void initCluster() {
long instanceId = EstTime.currentTimeMillis();
hstore_site.setInstanceId(instanceId);
InitializeRequest request = InitializeRequest.newBuilder()
.setSenderSite(0)
.setInstanceId(instanceId)
.build();
final CountDownLatch latch = new CountDownLatch(this.num_sites-1);
RpcCallback<InitializeResponse> callback = new RpcCallback<InitializeResponse>() {