public String removeWALRootPath(Path path) {
    String pathStr = path.toString();
    // remove the "/" too.
    return pathStr.substring(walRootDir.toString().length() + 1);
  }
Will only be called when loading procedures, where we need to construct the used worker set for
each peer.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/SyncReplicationReplayWALManager.java