void updateMembers(Collection<MemberInfo> lsMemberInfos) {
    checkServiceThread();
    final Map<Address, MemberImpl> mapOldMembers = new HashMap<Address, MemberImpl>();
    for (MemberImpl member : lsMembers) {
      mapOldMembers.put(member.getAddress(), member);
    }
    if (mapOldMembers.size() == lsMemberInfos.size()) {
      boolean same = true;
      for (MemberInfo memberInfo : lsMemberInfos) {
        MemberImpl member = mapOldMembers.get(memberInfo.getAddress());
        if (member == null || !member.getUuid().equals(memberInfo.uuid)) {
          same = false;
          break;
        }
      }
      if (same) {
        logger.log(Level.FINEST, "No need to process member update...");
        return;
      }
    }

    logger.log(Level.FINEST, "Updating Members");
    lsMembers.clear();
    dataMemberCount.reset();
    mapMembers.clear();
    memberMasterConfirmationTimes.clear();
    for (MemberInfo memberInfo : lsMemberInfos) {
      MemberImpl member = mapOldMembers.get(memberInfo.address);
      if (member == null) {
        member = addMember(memberInfo.address, memberInfo.nodeType, memberInfo.uuid);
      } else {
        addMember(member);
      }
      member.didRead();
    }
    if (!lsMembers.contains(thisMember)) {
      throw new RuntimeException("Member list doesn't contain local member!");
    }
    heartBeater();
    node.getClusterImpl().setMembers(lsMembers);
    node.setJoined();
    logger.log(Level.INFO, this.toString());
  }
  public Member addMember(boolean checkServiceThread, MemberImpl member) {
    if (checkServiceThread) {
      checkServiceThread();
    }
    logger.log(Level.FINEST, "ClusterManager adding " + member);
    if (lsMembers.contains(member)) {
      for (MemberImpl m : lsMembers) {
        if (m.equals(member)) {
          member = m;
        }
      }
      mapMembers.put(member.getAddress(), member);
    } else {
      lsMembers.add(member);
      mapMembers.put(member.getAddress(), member);
      if (!member.isLiteMember()) {
        dataMemberCount.increment();
      }
    }

    memberMasterConfirmationTimes.put(member, Clock.currentTimeMillis());

    return member;
  }
 // Will be called just before this node becomes the master
 private void resetMemberMasterConfirmations() {
   checkServiceThread();
   for (MemberImpl member : lsMembers) {
     memberMasterConfirmationTimes.put(member, Clock.currentTimeMillis());
   }
 }
  private void createRuntimeProps(MemberStateImpl memberState) {
    Runtime runtime = Runtime.getRuntime();
    ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean();
    RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
    ClassLoadingMXBean clMxBean = ManagementFactory.getClassLoadingMXBean();
    MemoryMXBean memoryMxBean = ManagementFactory.getMemoryMXBean();
    MemoryUsage heapMemory = memoryMxBean.getHeapMemoryUsage();
    MemoryUsage nonHeapMemory = memoryMxBean.getNonHeapMemoryUsage();

    Map<String, Long> map = new HashMap<String, Long>();
    map.put(
        "runtime.availableProcessors", Integer.valueOf(runtime.availableProcessors()).longValue());
    map.put("date.startTime", runtimeMxBean.getStartTime());
    map.put("seconds.upTime", runtimeMxBean.getUptime());

    map.put("memory.maxMemory", runtime.maxMemory());
    map.put("memory.freeMemory", runtime.freeMemory());
    map.put("memory.totalMemory", runtime.totalMemory());
    map.put("memory.heapMemoryMax", heapMemory.getMax());
    map.put("memory.heapMemoryUsed", heapMemory.getUsed());
    map.put("memory.nonHeapMemoryMax", nonHeapMemory.getMax());
    map.put("memory.nonHeapMemoryUsed", nonHeapMemory.getUsed());
    map.put("runtime.totalLoadedClassCount", clMxBean.getTotalLoadedClassCount());
    map.put(
        "runtime.loadedClassCount", Integer.valueOf(clMxBean.getLoadedClassCount()).longValue());
    map.put("runtime.unloadedClassCount", clMxBean.getUnloadedClassCount());
    map.put("runtime.totalStartedThreadCount", threadMxBean.getTotalStartedThreadCount());
    map.put("runtime.threadCount", Integer.valueOf(threadMxBean.getThreadCount()).longValue());
    map.put(
        "runtime.peakThreadCount", Integer.valueOf(threadMxBean.getPeakThreadCount()).longValue());
    map.put(
        "runtime.daemonThreadCount",
        Integer.valueOf(threadMxBean.getDaemonThreadCount()).longValue());
    memberState.setRuntimeProps(map);
  }