@RestrictedApi(explanation = "Should only be called in tests or ZKUtil", link = "",
      allowedOnPath = ".*/src/test/.*|.*/ZKDump\\.java")
  public static ServerName getMetaRegionLocation(final ZKWatcher zkw) {
    try {
      RegionState state = getMetaRegionState(zkw);
      return state.isOpened() ? state.getServerName() : null;
    } catch (KeeperException ke) {
      return null;
    }
  }
Gets the meta region location, if available. Does not block.
@param zkw zookeeper connection to use
@return server name or null if we failed to get the data.
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java