public void setRegionServers(List<ServerName> regionServers) {
      this.regionServers = regionServers;
    }
Once a SinkPeer has been reported as bad more than BAD_SINK_THRESHOLD times, it should not be
replicated to anymore.
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestHBaseReplicationEndpoint.java