private void waitForNewProcedures() {
    // watch for new procedues that we need to start subprocedures for
    LOG.debug("Looking for new procedures under znode:'" + zkController.getAcquiredBarrier() + "'");
    List<String> runningProcedures = null;
    try {
      runningProcedures = ZKUtil.listChildrenAndWatchForNewChildren(zkController.getWatcher(),
        zkController.getAcquiredBarrier());
      if (runningProcedures == null) {
        LOG.debug("No running procedures.");
        return;
      }
    } catch (KeeperException e) {
      member.controllerConnectionFailure("General failure when watching for new procedures", e,
        null);
    }
    if (runningProcedures == null) {
      LOG.debug("No running procedures.");
      return;
    }
    for (String procName : runningProcedures) {
      // then read in the procedure information
      String path = ZNodePaths.joinZNode(zkController.getAcquiredBarrier(), procName);
      startNewSubprocedure(path);
    }
  }
Pass along the procedure global barrier notification to any listeners
@param path full znode path that cause the notification
hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureMemberRpcs.java