public String getAcquiredBarrier() {
    return acquiredZnode;
  }
Top-level watcher/controller for procedures across the cluster.
<p>
On instantiation, this ensures the procedure znodes exist. This however requires the passed in
watcher has been started.
@param watcher         watcher for the cluster ZK. Owned by <tt>this</tt> and closed via
                       {@link #close()}
@param procDescription name of the znode describing the procedure to run
@throws KeeperException when the procedure znodes cannot be created
hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureUtil.java