code: private void syncSysMetaFromRemote() {
          for (String topology : JStormMetrics.SYS_TOPOLOGIES) {
              if (context.getTopologyMetricContexts().containsKey(topology)) {
                  syncMetaFromRemote(topology,
                          context.getTopologyMetricContexts().get(topology),
                          Lists.newArrayList(MetaType.TOPOLOGY, MetaType.WORKER, MetaType.NIMBUS));
              }
          }
      }
docs: sync sys topologies from remote because we want to keep all historic metric data
  thus metric id cannot be changed.