@Override
      protected void encode(ChannelHandlerContext channelHandlerContext,
        ClusterMetrics clusterStatus, List<Object> objects) {
        objects.add(new DatagramPacket(Unpooled
          .wrappedBuffer(ClusterMetricsBuilder.toClusterStatus(clusterStatus).toByteArray()), isa));
      }
Get the servers which died since a given timestamp. protected because it can be subclassed by
the tests.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ClusterStatusPublisher.java